The Mysteries of Fall Color

In case you were wondering…
Every autumn in Illinois brings with it a breathtaking change of color in the leaves of our trees, but although it’s late September, temperatures have been steadily topping out in the nineties every day.  Not a traditional sign of Fall, yet the trees are changing color and dropping leaves as if they were not aware of the hot and humid weather.
Aren’t the leaves supposed to change when it gets cooler and we see some frosts overnight?
Do the trees know what time of year it is despite the unusually warm temperatures?
One explanation, according to Native American myth, is that the hunters in the Heavens killed the Great Bear in autumn and its blood dripped over Earth’s forests coloring some of the leaves red.  As the hunters cooked the meat, fat dripped from the Heavens and colored some of the leaves yellow.
Not scientific enough for you? Need a more botanical answer?
In case you were wondering what actually initiates the changing color of the leaves and their eventual fall to the ground, read on…
Most people think that cool weather or frost causes the leaves to change color. It is true that there is usually a correlation between the cooler air and the onset of the autumn show.  However, while temperature may impact the color intensity, it has less impact on the timing of the color transitions we see in the Fall than do other factors.
A quick trip back to high school Botany 101.  During the spring and summer most of the foods necessary for the tree’s growth are manufactured in the leaves.  This food-making process takes place in the numerous cells containing chlorophyll, which gives the leaf its green color. This extraordinary chemical absorbs the energy from sunlight that is used in photosynthesis, the transformation of carbon dioxide and water to carbohydrates, such as sugars and starch.
In late summer or early autumn, the days begin to get shorter, and consequently, the nights are longer. Like most plants, deciduous trees and shrubs are rather sensitive to the length of the dark period each 24-hour cycle. When nights get long enough, the cells of the leaves begin to block transport of materials such as carbohydrates from the leaf to the branch. They also block the flow of minerals from the roots into the leaves. Because the starting time of the whole process is dependent on night length, fall colors appear at about the same time each year in a given location, whether temperatures are cooler or warmer than normal.
The fact is, the vivid yellow and orange colors have actually been there throughout the spring and summer, but we haven’t been able to see them. The deep green color of the chlorophyll, which helps plants absorb life-giving sunlight, hides the other colors.  In the fall, fewer hours and less intense daylight prompt the leaves to stop the food-making process. The chlorophyll breaks down, the green color disappears, and the yellow and orange colors already in the leaf become visible again to the human eye.  As the trees break down the green pigments and nutrients stored in the leaves they are shuttled into the roots for reuse in the spring.
Along with the green pigment of chlorophyll are carotenoids, yellow to orange pigments, which, for example, give the orange color to a carrot. At the same time other chemical changes may occur which produce red anthocyanin pigments resulting in even more variation in the Fall color scheme.  Some mixtures give rise to the reddish and purplish fall colors of trees such as dogwoods and sumacs, while others give the sugar maple its brilliant orange. For most of the growing season these colors are masked by the great amounts of green coloring.
The variations in Fall color are due to the mixing of varying amounts of chlorophyll residue and the other pigments in the leaf combined with a varied response to weather conditions. For instance, as the nights become cooler, the sugars trapped in the leaves of some oaks and maples will often form a red pigment.  The degree of color will also vary from tree to tree.  Leaves directly exposed to the sun may turn red, while those on the shady side of the same tree or other trees may be yellow.
As the fall colors appear, other changes are taking place. At the point where the stem of the leaf is attached to the tree, a special layer of cells develops and gradually severs the tissues that support the leaf. At the same time, the tree seals the cut, so that when the leaf is finally blown off by the wind or falls from its own weight, it leaves behind a leaf scar. Most of the broad-leaved trees in Illinois shed their leaves in the fall. However, the dead brown leaves of the oaks and a few other species may stay on the tree until growth starts again in the spring.
In general, autumn weather conditions favoring the most brilliant colors are warm sunny days and cool, but not freezing, nights. When there is mainly warm, cloudy and rainy weather in the fall, the leaves may have less red coloration.  A few hard frosts can cause the leaves to wither more quickly and drop to the ground.
So, in case you were wondering, with all due respect to the Native American myths, it is a combination of temperature, light, and water supply that have an influence on the onset, the degree, and the duration of fall color.
Enjoy it while you can, because it doesn’t last long!

Find a little peace in what nature provides

Recently I had an interesting experience…

It was a Sunday morning after a particularly stressful week and I decided to wake early and make our weekly grocery store run, by myself, for some piece and quiet.  I was seeking some room for my mind to wonder, relax, only contemplating freshness of produce and what to make for our family’s dinner.

The trip through the store was pleasant enough.  The store seemed to be populated with those of us trying to achieve the same thing.  Getting away from the chaos.

As I was leaving, feeling calm and refreshed, I noticed a couple that might intersect me at a walkway.  I proceeded because I thought I had plenty of room to turn before they reached the intersection.  After I turned I glanced in my side mirror to make certain that the couple had enough room.  It seemed as though they did not as the woman violently gestured to me, and as a result I gasped and held my mouth agape.  She must have seen me because she smiled wide and waved, as though immensely satisfied her blow had struck home.

I was devastated.

I could not comprehend in that moment how someone could have so much anger at 7 am on a Sunday morning on a relaxing stroll with their spouse.

But what is true today is that there are a lot of people with so much anger.  It is as if we have forgotten to see the best in situations, the best in each other and are reluctant to give one another the benefit of the doubt.  I was, and still am, greatly saddened by that situation.  So much so that I am writing this on our company’s blog in order to put something positive into a world that has become one I no longer want to recognize.

Those of us that have stress, have hardships, have pain…those of us that may not have the strength or support to get through it with positivity…consider this…

Start by finding beauty in the nature that surrounds you.  Take time to walk, sit and drink up the colors, textures and serenity of public parks and nature preserves.  Consider planting a garden, it is such a labor of love and provides such a feeling of accomplishment.  Seek a little peace in that which provides boundless beauty.

Each night I say to my family, “let’s go on a garden walk!”  Sometimes I get resistance of why or I’m too busy, but on the nights when we spend 20 minutes looking to see what is blooming, what is changing, what smells gorgeous, we find commonality and peace.

That is what we should all be looking for.

  • Donna Vignocchi Zych, President

There’s no business like snow business

They all look the same from a distance but show subtle differences when examined closely.
The same might be said of snow removal contractors.  We may all look the same at first glance, (trucks, tractors, plows, etc.), until you take the time to find out a little more about what we do and how we do what we do;
and you should take that time.
The subtle (or sometimes extensive) differences in capabilities, commitment, and conscientiousness will have a significant impact on the performance on your property; and that performance can make you, the property/facility manager, look like a hero to your residents, tenants, and employees…or not.
Here are five important lines of questioning to help you ensure that you are hiring the contractor best suited to make you look like a hero.
  • CONTRACTS:  What is your contract structure and how are fees applied?
Contract terms have many variations (per plow, per inch, lump sum, time & material, etc.).  You need to have clear terms that suit your specific needs, with reliable pricing, and no surprises. While cost is always a factor when making contractor choices, the less obvious consequences of using a lower priced but ultimately incapable snow removal contractor can cost you much more than money if that contractor fails to perform during one of Chicago’s challenging winters.  Additionally, if those less expensive contracts are peppered with “extra” charges, you can find yourself paying much more than you would have had you chosen a more comprehensive service provider.
  • CAPABILITIY:  What is your company’s policy in regard to the amount of snow removal business you will commit to in any given winter and where will my property fall in your list of priorities? How do you determine the maximum thresholds that you can manage?  How do you allocate your resources during a weather event?
Do you handle the snow removal work in-house with your own employees or do you need to rely on the help of outside subcontractors who may not offer the same level of commitment to the work?
Who are some of the customers you work with now that I can talk to about their experience with you?
  • PLANNING: What is your specific operational plan for my property?  Are you familiar with properties like mine and clear on our specific needs? What resources are you willing to commit to this property?
  • TECHNOLOGY:  Do you subscribe to a reliable weather forecasting service that will provide site specific forecasts on a real-time basis, daily operating forecasts, snow and ice warnings that are geographically targeted to our service area, and snow accumulation reports to assist us in the management of your force?
How are your crews dispatched and monitored throughout an event?
Do you rely on media broadcasts, airport reports, your own production yard, or will you send a representative out to my property to assess conditions on the site prior to mobilization?
  • ACCOUNTABILITY:  How do you measure and document snowfall to determine commencement triggers, billing parameters, and mobilization?
What is your reporting process to ensure that I will be kept informed of progress and problems throughout a weather event?
Who will be available to me for communication regarding issues and special needs?
What is your policy for repairing or resolving damage that occurs as a result of the snow removal efforts?
Taking the time now to find out a little more about the differences between contractors by asking these important questions will help to ensure that you are using the company best suited to satisfy your needs.
At ILT Vignocchi, we welcome your scrutiny; and if you become a customer, we will make you look like a hero.
Call or email us today and find out more about the ILT difference.

Mums the Word…

Nothing says fall like mums, kale, pansies and pumpkins.  
 
Give your property that autumnal feel by having ILT Vignocchi design and install a fall-tastic display of annual flowers.
You see, our wholesale nursery Montale Gardens, is very busy growing mums that are looking for new homes.
They will be ready mid to late September so you have them in time for your Halloween festivities!
You don’t want to miss out getting into that fall spirit!  So call your account manager now!

Benefits of Fall Planting

Most of us love fall, but plants love it even MORE!
 

Most people think of fall as the end of the growing season and the beginning glimpse of another Chicago winter.  Well try to look at it as an ideal time to plant!

Fall is a perfect time for planting shrubs, trees, grass seed, and even perennials if they have a developed root system. Fall planting gives plants time to develop roots before winter’s blustery conditions.  The conditions are also less stressful and there may be more reliable precipitation.

What happens during fall conditions is a plant’s leaf and flower production is usually slowing down and approaching dormancy. Therefore, a plant can focus on root production.  Roots continue to grow when other parts of the plant are not. Generally speaking, root systems will keep growing as long as the soil temperature is at least 50 degrees.

Although we generally get more rain in fall, the good news is that plants use less water then.  Because days are increasingly shorter and cooler in the fall, plants are going to be photosynthesizing less and using less water.

Fall is also when depleted nurseries can begin to dig plants again, so varieties that were either unavailable or just downright unsightly in July and August, may become available.

Finally, don’t forget about BULBS!  Its often surprising why more people don’t take advantage of this relatively inexpensive way to welcome in Spring.  To achieve a gorgeous Spring show bulbs are planted in late fall.

Spring Tulips

If you’d like to start planning a fall project, it is right around the corner, so call us now and we will be happy to assist you!

Water and why you have to plan for it

After an uncharacteristically hot and dry June, Mother Nature just sent us a harsh reminder of her ability to restore rainfall statistics rapidly.

Unfortunately for many homeowners and businesses, this reminder came in the form of a seven-inch downpour over a 24-hour period that is still causing overflow and flooding around local rivers, lakes, and retention ponds.

Gurnee, IL experiences massive flooding

While it is difficult to predict and prevent the kind of flooding issues that are created by such catastrophic weather events, these events serve as a reminder to property owners, both commercial and residential, to be more aware of the impact that water flow has around your property.  Having a well-conceived and expertly executed drainage system around your buildings and grounds can mean the difference between staying high and dry through any weather event, or dealing with flooded yards, basements, parking lots, and roadways.

Generally, rainfall is the catalyst for creating drainage issues but ground water, specifically the location of the water table, can also play a role in the ability of water to move by design.  Where land is flat, soils are dense (clay), or the water table is high, a well-designed drainage system is a priority.  Consideration of grading, water flow, and proper drainage is essential to prevent minor issues during normal weather and to minimize major damage during catastrophic events like the one we experienced here in northern Illinois last week.  Without proper drainage systems in place, water can enter and undermine structures, damage drives and roadways, cause erosion issues, and drown expensive plant material.

It is not always enough to rely on the original drainage plans that were created for your property when it was first developed and constructed.  Typically, the more recent the development took place, the better the chances are that the drainage systems were designed and constructed to effectively move water around the property.  Older properties may have experienced settling, ground shifts, changes in water tables, neighboring development, or many other factors that can influence the effectiveness of these systems.  New or old, it is a good idea to observe and review the water flow issues on your property before a major problem occurs.

SURFACE WATER is one of the more common problems associated with improper or inadequate drainage systems.  Sites with clay soils will likely have issues with lingering surface water. By design, developed land should be graded to drain so that water flows through swales or sheet drains across turf or pavement to the curb or storm drain. The reality is that builders don’t always get their grades right and water becomes trapped, causing puddles on pavement, backflow against foundations, soggy zones in lawns, and muddy planting beds.

Downspout/sump pump discharge is a huge contributor to surface water issues.  Enormous amounts of water can come off a building’s roof or be channeled into a sump pit during a typical rainfall.  This water is often just re-directed back along the foundation of a building where it can go right back into the sump pit or collect on the surface of the ground around the structure.

SUB-SURFACE WATER collects underground, and becomes trapped when there’s poor drainage due to the existing soil structure or high water tables.  When it freezes and expands, the potential for damage increases. The frozen water pushes against your foundation and paved surfaces, causing heaving, cracking, and structural damage.

Solutions to improper site drainage can range from the very simple to much more complex depending on the nature of the issue and its underlying cause.  Conceptually, solutions fall into two basic categories.

  1. Capture the runoff and store it for reuse or allow it to percolate back into the soil.  Rain barrels and cisterns are used for storage of runoff water for use later as manual watering sources. Dry wells, French drains, rain gardens, and specific soil amendments can be used to collect and redistribute water back into the surrounding soil.These solutions have many environmental benefits such as reducing runoff from your property, filtering runoff, watering your yard, and recharging groundwater.
  2. Intercepting and redirecting runoff provides an opportunity to safely discharge high volumes of water to a place away from the problem area(s). This can be done using swales, French drains, catch basins, underground pipe assemblies, or downspout/sump pump extensions with splash blocks. These methods of rerouting water can also be combined with other capture and storage elements to provide even more benefit.

Please make note that whenever you are redirecting runoff, you must send it to a suitable outlet. Discharging runoff to an unsuitable area will just move the problems downhill. Be aware that redirecting runoff without collecting it or allowing it to percolate into the soil can negatively impact neighboring properties.

The first step in solving drainage issues on any property is discovering that they exist.  Problems like foundation seepage and erosion might not be obvious until a major issue develops at which point resolution can be expensive and complicated.  To become aware of potential trouble spots, walk your grounds after a rainfall event and look for places where water has collected.

Does it take more than an hour or two to dissipate after a heavy downpour?

Are there signs of erosion around the downspouts or sump pump discharge points?

Are you finding soft, wet spots in the common turf areas that do not dry out readily?

Are you seeing a decline in the health and appearance of plant material located in the collection areas?

These are just a few of the signs that water is not percolating or moving appropriately around the grounds of your development or commercial property.  Time to consider having an expert come out and assess the problems.  ILT can do simple visual inspections or accurately read existing grades by laser transit to establish the exact topography no matter how flat the site may seem.and determine precisely where and why water is moving the way it is on your property.  From that information, we can evaluate and present potential solutions for your consideration.

While last week’s flooding can serve as a reminder of the devastating impact heavy rainfall can have, it does not take a seven-inch downpour of water to cause damage around your property.  Finding and resolving water flow issues before they become expensive problems is always a better solution.

Call ILT Vignocchi today and we can start a conversation about resolving water flow issues at your HOA or commercial building.

Hosta Sunburn

Think you have fungus on your hosta?

Consider another possible diagnosis based on the plants’ exposure to sun.  Although some can tolerate more sun than others, hostas are basically known as shade loving plants.  Their vascular systems tend to only be able to handle a lower level of transpiration.

Transpiration is the transfer of water from the roots, through the plant’s vascular system to tiny pores underneath its leaves where it changes to vapor and is released into the air.

Non-sun tolerant hostas when put in sunny conditions are being asked to replace water at a rate that their vascular system cannot handle.  Hence sunburn.

Here are a few tips about using hosta in sunny conditions.

  1. Use varieties with light green to green leaves.  August Moon and Guacamole are good examples.
  2. Stay away from using variegated hosta.
  3. Never use hosta in a sunny spot unless it is irrigated or you are prepared to water it by hand…a lot.

This is what sun burned hosta can look like

 

Landscape Architects, Designers, Contractors – what’s the difference?

ILT Vignocchi, Inc. Landscape Architects and Contractors…it’s part of our name because it’s that important.   Landscape architects, landscape designers, landscape contractors, etc.; in case you were wondering what the difference is, read on…

While there may be a lot of overlap in these professions, the distinctions between them can make a world of difference in the planning, execution, and ultimate functionality of the outdoor spaces around your office building, campus, park, or HOA community.  To fully understand the distinctions between landscape architects, landscape designers, and landscape contractors you need to look at both the technical and the functional aspects of the job.

A Landscape Architect must have a professional license issued by the registration board in the state in which they are performing work. In order to become licensed, they must have a degree in Landscape Architecture from an accredited school, some years of experience working for a licensed Landscape Architecture firm, and pass a qualifying exam. Landscape architects must adhere to a code of professional standards, actively participate in continuing education, and be current with state-of-the-art developments and trends in the landscape design field.

A rendered landscape plan by ILT Vignocchi

Landscape Designers may have varying levels of knowledge and expertise; however, they are not required to be licensed or certified, and are not regulated by the state.  The “credential” for Landscape Designers has no legal bearing.  While many Landscape Designers do have some level of professional training, they can call themselves such without any formal educational or experience requirements.

Finally, the Landscape Contractor is the team that is responsible for physically building, installing and maintaining the landscape conceived by the architect or designer. They are not government regulated beyond typical local business licensing requirements, and their insurance and liability coverages vary widely. Dependent upon their levels of expertise, they may be able to furnish and install the plant materials and build the structures, hardscapes, and water features called for in a given design.

Licensed Landscape Architects use their technical and artistic talents to create drawings, construction documents, and specifications that dictate the allocation, arrangement, and construction of planting schemes, land elements, water resources, and integrated structures.  They usually work on larger scale projects such as commercial buildings, public parks, recreation facilities, institutional buildings, clubhouses, and multi-unit residential communities, and complex residential work. They are trained to document design concepts and plans on paper as a visual, graphic means of communicating their designs. This is especially important for complex projects that require permitting through city planning or building departments.

Because Landscape Architects have a responsibility for the health, safety, and welfare of the public in the work they do, they need to be licensed and are required to have professional liability insurance.  By contrast Landscape Designers have no legal responsibility for the health, safety and welfare of the public, are not required to carry liability insurance, and are generally only allowed to design simple, single-family residential gardens.

Thoughtful landscape architecture adds value to a commercial development, public spaces, or an HOA community by considering both the aesthetic and practical aspects of the landscape.  A landscape architect is conscious of the environmental issues with which today’s society is faced and has the expertise and training to plan around and manage the challenging issues on both commercial and residential sites, including:

  • Use of space, traffic volume, and human impact on the landscape
  • Appropriate plant selection and placement for long term impact
  • Elevation, grading, and land usage
  • Hardscape elements such as retaining walls and paving surfaces
  • Water movement, Irrigation and drainage systems
  • Outdoor structures
  • Placement of recreational features, utilities, service lines, entryways, driveways, parking, etc.

At ILT Vignocchi, we are licensed, certified landscape architects, proficient in the “big picture” planning, design, construction, and maintenance of both public and private landscaped environments. We can help you develop your project from the “ground up”; providing initial concepts, finished designs, construction plans and specifications.  Additionally, as contractors, we can build your outdoor environment to the exact specifications of the design, then maintain it to maximize your return on your investment.

Whether you are starting a project from the concept phase, interested in a large-scale renovation, or a simple redesign of a courtyard or monument sign, give us a call today and find out how ILT can help you.

“Water, water, everywhere, | Nor any drop to drink” – The Rime of the Ancient Mariner

Considering all of the rain Mother Nature has blessed us with over the last few months, automated irrigation systems are hardly first and foremost on most of our minds right now.  However, summer heat and dry weather will be upon us soon and keeping landscapes lush and green will once again be the focus of commercial landscaping contractors and property owners.  But that lush greenery comes at a price; hand watering takes time, costs money, and maybe most importantly, wastes a lot of water.  In case you were wondering how you can save money this season through more efficient watering methods, read on:

Water conservation is not simply a “green” issue promoted by environmentalists, made even more prominent in the wake of recent severe droughts in the United States and abroad.  Fresh water conservation is an obligation shared by everyone on the planet.  Installing and maintaining an automated sprinkler system will help to avoid wasteful over-watering, ensuring a safe and healthy water supply for future generations; and by the way, will save you a lot of time and money in the long run.

Water conservation, through the use of automated mechanical systems, will save significant amounts of time, money, water; while still keeping your grass green, your flowers bright, and your ornamental plant material healthy and hearty.  Hand watering can waste more than 50 per cent of the water used due to over-watering, runoff, and evaporation.  An automated system can be programmed to water during the cool, dark overnight hours thus minimizing evaporation.  The system components will direct water to specific areas and, when timed properly, high efficiency nozzles will disperse only as much water as the plant can absorb in any one watering.  Saving money, doing the right thing environmentally, while still protecting the investment you make in your landscaping are all solid reasons to consider installing an automated irrigation system.

The irrigation industry has made tremendous advances in the way of technology over the last several years.  Manufacturers now provide more cost-effective, efficient, and reliable materials and designs than ever before, making it a great time to reconsider installing a system around your business or homeowner’s association grounds.  Even if budget constraints force you to restrict your system to flower beds, monument sign plantings, and high visibility turf areas at first, the technology is such that add on revisions later are simple and relatively inexpensive once the main water lines are in place and controllers with multi-zone potential have been installed.

With the advent of smart controller technology and wi-fi capability, water management can be monitored and managed from virtually any location, giving you and your service contractor greater flexibility to adjust your system from virtually anywhere at any time.  All landscapes are different and therefore the irrigation needs of your specific landscape must be assessed and evaluated to ensure that your system is designed and installed according to those specific needs.  The key is to get a professional design that appropriately combines the basic components of a modern automated system (high efficiency nozzles, drip lines, rain sensors, etc.) with the available smart controller technology.

Once you have made the commitment and installed your system, it will only be an effective water conservation and money saving tool if it is managed properly.  A mismanaged system can still result in enormous amounts of wasted water.  Broken heads can lose thousands of gallons of water unnecessarily; timers without rain sensors can still kick on in the rain; and broken lines underground leach out water into the soil with no benefit to your plant material.  Modern technology allows you and your contractor to monitor your system remotely and be alerted to these issues immediately, allowing for timely repairs with minimal lost water/money.

If you haven’t considered installing an automated irrigation system or thought it was too expensive the last time you looked at it, now would be a great time to reconsider.  With today’s modern materials and more efficient means of installation, it may be much more affordable than you once thought.  And the money you save over the long run can be put towards improvements and upgrades in your landscaping or elsewhere around your business or HOA grounds.

Contact ILT today and find out how you may benefit from automating your watering efforts.

Designing for Security

Spring is often the time when building owners and HOA boards consider re-designing or refreshing their landscaping with some new plantings. At ILT Vignocchi we understand that aesthetics are always a big factor in plant selection, along with exposure, growth habits, site consistency, and even personal taste.
One frequently overlooked factor when making plant selections and choosing locations is security. Although the ideal time to consider landscaping for security around multi-family or commercial buildings is during the design phase; either at the onset of a new construction project or when a landscaping renovation is being contemplated, security should always be a major factor in your landscaping scheme.  In any case, it is important for a designer or landscape architect to “think like a thief” as he/she begins to consider the types of plants that will be used and their specific placement around the property.
In case you were wondering how to use landscaping as a simple, yet effective security feature, read on
One of the more common security considerations we make is to place low growing shrubs and ground covers under windows and around other entry points to keep sight lines open from street to structure and from inside a building outward.  These considerations, along with the use of plants with thorns, spines, or other prickly growth can discourage intruders from crawling along walls and windows.  The latter can also be useful around utility structures and other unsightly elements on a property as aesthetic screens which also deter vandalism.  However, remember to always take care not to block access for service workers.
A common misstep made by inexperienced landscapers is to plant young trees too close to buildings and other structures in an effort to create instant impact; not anticipating for their growth, and the eventual problems that the close proximity may cause to roofs, gutters, foundations, siding, windows, etc.; not to mention the potential security issues.  We place trees so that they will offer subtle screening and aesthetic interest from the street and out from windows; but we are careful to place them far enough away from building faces to avoid structural damage and so that the branches don’t offer easy access to the upper story windows and balcony/deck doors which homeowners may leave unlocked.
Landscape lighting can be a very useful tool against crime both around the outside perimeter of a building or in parking lot medians, courtyards, and loading areas.  Low voltage landscape lighting is an especially effective and beautiful addition to the landscape that will also serve to expose potential predators sneaking around the entry points of your building.  Illuminating the trees and planting beds around your property will likely discourage thieves from even attempting to gain access to your building.
When you are trying to evaluate a particular landscape design from a security standpoint, view the landscaping around your property as if you were looking for a way to break into the building.  Think like a thief. Check your entrances to see if there are any dense shrub masses, tall groupings, or low hanging tree branches that an intruder would be able to hide in or climb on as he/she attempts to gain entry into your building.  Heavily planted areas adjacent to parking islands can create safety issues for drivers accessing their cars late at night.  The same with service entrances or dock/garage doors where dense plantings make particularly attractive hiding places for someone looking to slip into your building through an open door as you pull in a car, carry out garbage, or unload a truck.
Remember, aesthetics and curb appeal can go a long way to marketing and your property but security and practicality should be of equal consideration when planning any planting job.  Intruders tend to seek the path of least risk and resistance. By carefully considering your design choices, lighting the perimeters and entrances of your property, planting trees or pruning tree branches away from structures, planting shrubs with some forethought and trimming shrubs and other brush away from access points such as windows and doorways, you can make your property a far less attractive target for criminals.