Archive for the ‘Tree & Shrub Care’ Category

When Should I Have My Trees & Shrubs Pruned?

Friday, December 2nd, 2011

When Should You Prune Your Trees?

When is the ideal time for pruning? After a rainy year like we just experienced your trees may be wild and overgrown.Pruning should be done to remove any dead, broken, injured, diseased, or insect infested branches or to prune out branches that are too large, low or overhanging or have become a hazard.

You should also prune when the weather is dry so disease doesn’t get in the wounds. Don’t prune when it is very hot or during drought conditions either as this could stress the tree or shrub.

Spring Flowering Trees & Shrubs

Pruning plants whose flowering time is before June 1st is best right after blooming to promote flowers for next year. Some examples include: crabapple, deutzia, forsythia, lilac, redbud, serviceberry, rhododendron, viburnum and weigela.

Summer Flowering Trees & Shrubs


Plants that flower after June 1st can be pruned at anytime, except in the heat of the summer when insects are active. Twiggy shrubs such as potentilla and spirea also benefit from a good trimming first thing in the spring. They will bounce back looking fresh and full. These plants may also be lightly trimmed after each flush of bloom to promote re-bloom.

Evergreens

After new growth and around late June is a good time for evergreens. You should have 50-90% of the new growth trimmed back, being careful to avoid cutting back into older wood. Prune every year to encourage tighter, more compact growth. Allow some new growth to remain every year. Evergreens shouldn’t be pruned in late summer or fall as late new growth will be prone to winter burn.

Trees

Many trees are best pruned in winter when they’re dormant. If certain species of trees are pruned early in the spring, they will “bleed,” stressing the tree and causing health problems. Maples and birches will “bleed” or lose sap from pruning cuts made early in the spring. This does not hurt the tree, and the loss of sap is inconsequential. With a few exceptions, most routine pruning can be done any time of year. The worst time is just as the tree has leafed out in the spring. Wait until the leaves are dark green in summer. The best time is when the tree is dormant.

Newly Planted Trees

Limit pruning at the time of planting to structural training and the removal of damaged branches as they need their crown to produce food and plant hormones that induce root growth.

Contact Wood Acres Tree Specialists for more information on the proper time to have your trees pruned. Wood Acres is staffed with certified arborists, We have been caring for trees and pruning them correctly to promote tree health in Maryland and Washington, DC since 1983. For beautifully healthy trees: Wood Acres Tree Specialists.

Caring for Mature Trees

Tuesday, November 1st, 2011

Caring for mature trees is an investment

Investing in the health of your mature trees brings many benefits to you and your property.

A well-maintained tree:

  • increases in value with age
  • increases property values
  • beautifies our environment
  • purifies the air
  • saves you energy (provides cooling shade in the summer and protection from winter’s winds)

A preventive care program for your landscape plants is like a savings plan. Regular maintenance, designed to promote plant health and vigor, ensures their value will continue to grow and is much less costly and time-consuming than curing one once it has developed problems. A good maintenance program includes regular inspections and the necessary follow-up care of mulching, fertilizing, and pruning, & can detect problems and correct them before they become damaging or fatal. Many tree species can live centuries –  as long as 200 to 300 years, so including these practices when caring for your home landscape is an investment that will offer enjoyment and value for generations.

Mature Tree Inspection

You should have regular inspections of mature trees at least once a year. Look for four characteristics that represent tree vigor:

  • new leaves or buds
  • leaf size
  • twig growth
  • absence of crown dieback

Any abnormalities found during these inspections, including insect activity and spotted, deformed, discolored, or dead leaves and twigs, should be noted and watched closely. If you are uncertain as to what should be done, report your findings to Wood Acres Tree Specialists, certified Arborists.

Mulching Mature Trees

Mulching reduces environmental stress by providing trees with a stable root environment that is cooler and maintains moisture longer. Mulch can also prevent mechanical damage by keeping machines such as lawn mowers and string trimmers away from the tree’s base which can wound it and expose it to insects & disease. Mulch also reduces competition from surrounding weeds and turf.

Place mulch 2 to 4 inches deep and cover the entire root system, which may be as far as 2 or 3 times the diameter of the branch spread of the tree. If the area and activities happening around the tree do not permit the entire area to be mulched, it is recommended that you mulch as much of the area under the drip line of the tree as possible. When placing mulch, do not cover the actual trunk of the tree. This mulch-free area, 1 to 2 inches wide at the base, is sufficient to avoid moist bark conditions and prevent trunk decay.

An organic mulch layer 2 to 4 inches deep of loosely packed shredded leaves, pine straw, peat moss, or composted wood chips is adequate. Thicker mulch depths or plastic should not be used because it interferes with the exchange of gases between soil and air, which inhibits root growth.

Fertilization of Mature Trees

Fertilization is another important aspect of mature tree care. Trees require certain nutrients to function and grow -especially in urban landscapes. If fertilizer is not applied wisely, it may not benefit the tree at all and may even adversely affect the tree. When considering fertilizer, it is important to know which nutrients are needed and when and how they should be applied which is a fairly complex process because conditions vary greatly in soil and environment.

Wood Acres Tree Specialists can arrange to have your soil tested at a soil testing laboratory and can give advice on application rates, timing, and the best blend of fertilizer for each of your trees and other landscape plants.

Since mature trees have expansive root systems that extend from 2 to 3 times the size of the leaf canopy, a major portion of actively growing roots is located outside the tree’s drip line. Many lawn fertilizers contain weed and feed formulations that may be harmful to your trees. When you apply a broadleaf herbicide to your turf, the same herbicide that kills broadleaf weeds in your lawn is picked up by tree roots and can harm or kill your broadleaf trees if applied incorrectly. Understanding the actual size and extent of a tree’s root system before you fertilize is necessary to determine how much, what type, and where to best apply fertilizer.

Pruning the Mature Tree

Pruning is the most common tree maintenance procedure next to watering. Pruning removes dead, diseased, or insect-infested branches and improves tree structure, enhances vigor, or maintains safety. Because each cut has the potential to change the growth of (or cause damage to) a tree, no branch should be removed without a reason.

Overpruning is extremely harmful because without enough leaves, a tree cannot gather and process enough sunlight to survive. However, after pruning, the growth that does occur takes place on fewer shoots, so they tend to grow longer than they would without pruning. Pruning mature trees usually requires special equipment, training, and experience. If the pruning work requires climbing, the use of a chain or hand saw, or the removal of large limbs, then using personal safety equipment, such as protective eyewear and hearing protection, is a must. Wood Acres Tree Specialists Arborists can provide a variety of services to assist in performing the job safely and reducing risk of personal injury and damage to your property as we are fully insured and highly trained in the safe removal of trees.

The Plant Health Care Maintenance Program

Maintaining mature landscapes is a complicated undertaking but Wood Acres Tree Specialists can simplify this for you. Consider our professional Plant Health Care (PHC) maintenance program for healthier trees and shrubs. The PHC program is designed to maintain plant vigor and includes the Plant Health Care Report & inspection to detect and treat any existing problems that could be damaging or fatal. Thereafter, regular inspections and the right kind of preventive maintenance determined by our tree experts will ensure tree and shrub health and beauty for your valuable property landscape.

 

Extreme Wet Weather – Get Your Trees Assessed

Friday, September 9th, 2011

 

Don't Procrastinate on Tree Assessment

The extreme soaking, wet weather this season has created problems with trees falling because their roots won’t hold in the saturated ground. The ground gets soft, trees lean, take up too much moisture to the crown – and topple.

Those falling trees come crashing down on roadways, houses, yards and power lines costing time and money that could have been avoided with a Tree Report. Wood Acres crews have been busy cleaning up the aftermath of trees suffering from too much water, wind or both.

Trees add to our enjoyment of the outdoors, improve the air we breathe and contribute to the value of our properties. However, trees also have liabilities associated with them. The key to reducing those liabilities is to recognize when a tree becomes hazardous and take the appropriate steps to correct or eliminate the hazard.

Our Certified Arborists provide a Tree Structure Evaluation/Risk Assessment Report. This report provides the following information: tree species, size, species failure profile, evaluation of location and site of tree, visual tree analysis, wood rot-decay analysis, risk rating, interpretation of evaluation and remedial treatments.

Don’t wait. Contact Wood Acres Tree Specialists – arborists that are fully licensed, insured and certified to take care of your trees.

 

Maryland Counties Quarantined for Emerald Ash Borer

Saturday, June 18th, 2011

Since the presence of the emerald ash borer, a highly invasive tree pest, has been confirmed in Howard County The Maryland Department of Agriculture (MDA) has created a quarantine area in Charles (detected 2008), Howard (detected June 2011), and Prince George’s (detected 2003) Counties.

The quarantine prohibits anyone from moving ash trees or any hardwood firewood out of the three counties until further notice to hamper the spreading of the EAB (Emerald Ash Borer). As it is still early in the EAB season they will be surveying the area to assess the infestation and keep the quarantine updated.

There are around 6,000,000 ash trees in Maryland. The USDA has estimated that losses could exceed $227.5 million in the Baltimore area alone if the emerald ash borer were to get a foothold.

Emerald Ash Borers kill ash trees within 3 years of infestation. Signs of infestation are:

  • Upper third of tree thins and dies back
  • A flourish of shoots or branches coming out the infected portion of the tree
  • Small D-shaped exit holes in the bark
  • Vertical splits in the bark
  • Looping tunnels beneath the bark in the cambium, where larvae stop food and water movement in the tree and starve it to death.

Don’t move firewood, don’t plant ash trees, and call Wood Acres Tree Specialists should you suspect the vociferous Emerald Ash Borer (look for a metallic green insect). Visit our insect index for image and more information on EAB.

Temperature’s Role in Tree Growth and Insect Populations

Wednesday, June 1st, 2011

Temperature's Role in Tree & Insect Development

Trees’ and insects’ growth and development are dependent on environmental factors like temperature (heat), light and humidity.  Because insects are cold-blooded, temperature has the greatest effect on insect development rates.Development rate increases as temperature increases up to a point.  In the temperature range from 10 to 30 degrees, development rate changes almost linearly with increasing temperature.  At very low temperature there is no development, and at very high temperature development is stunted.

 

Since temperature influences tree growth in a similar manner to insects, development of the various growth stages in the tree is dependent on temperature.  Each stage of tree development requires a certain amount of heat units before growth to the next stage will occur.  This measure of accumulated heat over time is known as physiological time. For instance, remember the cool, rainy late-winter/early-spring weather we recently had? This year’s cherry blossom’s in DC went from 2/28/2011 (green color in buds) to 3/29/2011 (peak bloom).Last year’s cherry blossoms only went from 3/14/2010 (green color in buds) to 3/31/2010 (peak bloom) because it was warmer earlier – so developmental growth speeded up – and left us with less time to enjoy the blooms.

For many years, growers have observed the arrival or development of a partlcular insect pest with flower bud or leaf development and have timed the applications of sprays in the spring.  This is an indirect use of physiological time.  Using these natural timers are most useful early in the growing season when tree growth stages are readily observable. However, making accurate predictions on insect life stages throughout the growing season are needed.  This is done by measuring degree-days of the insects in question.

What are degree days? Entomologists have determined lower threshold temperatures and degree-day totals for the life stages of many  insects by studying their development in the field and the laboratory.  The lower developmental threshold for a species is the temperature below which development stops. The upper developmental threshold is the temperature at which the rate of growth or development begins to decrease. Phenology models are then developed and used to predict various events or lifestages of an insect. This is useful for tree and shrub care companies because it gives a general timetable for when to treat insect pests during the correct stages to be effective.

Mother Nature is full of surprises! If you find your insect pest populations are out of control this season and damaging your trees and shrubs, contact Wood Acres Tree Specialists for a consultation. It takes years to grow a beautiful tree or shrub specimen – don’t let it be disfigured or destroyed in one season.

Tent Caterpillar or Gypsy Moth?

Monday, May 23rd, 2011

Eastern Tent Caterpillars

Eastern tent caterpillars and gypsy moth caterpillars- both are about the same size, hairy, and have bands of black and brown colors with narrow yellow stripes, and blue spots. But -Gypsy moth caterpillars also have red spots and this is a distinct difference between the two.
Gypsy moth caterpillars are not just an unattractive nuisance, but this invasive pest is very harmful to deciduous hardwood trees, like oak. The damage they can do to trees ranges from light to nearly full defoliation. Entire parks have been closed for spraying to try to control their ravenous appetites. Most infected trees will survive a single infestation and defoliation, but continuing damage can weaken a tree and leave it vulnerable to drought, cold, disease or other insects.

The other major difference is in their eating habits: tent caterpillars prefer to feed safely in their tent. Gypsy moths don’t make webbing and eat out in the open.They like to hide on the underside of leaves, branches, or some other inconspicuous part of the tree, or they hide in brush on the ground, and do most of their main feeding in the veil of night so predators don’t pick them off.
Eastern tent caterpillars damage occurs early in the season and their host trees can usually grow more leaves afterwards and rebound.
If you believe you have a serious problem with caterpillars contact Wood Acres Tree Specialists for a consultation with our tree and shrub care division.

Tree & Forest Pests – The Invisible Alien Invaders

Saturday, March 5th, 2011

Before you know it your beautiful century-old tree that defined your entire property could be gone. How could it happen right under your nose?:  Invasive species. The nation’s forests and trees are at risk from these silent invaders from “out of town”. These tiny bugs cost the US economy $120 billion annually.

Invasive species are bugs, borers, and beetles that come into the U.S. by way of package, shipping materials, plane, vegetable, flower – or any other carrier that passes from one country to another. They enter, too tiny or deeply burrowed to notice, find a species of tree that they like, flourish, establish a population – and have no natural predators. They are almost impossible to eradicate once they’ve reached that level.

Some insects that are on the invasive species list currently:

Want to help? Visit Wood Acres Tree Specialists’ Insect Index and educate yourself  about damaging insects. You’ll learn a lot and with your newly acquired awareness perhaps save a tree – or entire forest -  before the damage has been done.

Tree Structure Evaluation/Risk Assessment Report

Friday, December 10th, 2010

Have Wood Acres Analyze Your Trees' Health

Are your trees ready for winter? After the past year’s storms they may have been weakened and could fail.

Wood Acres Tree Specialists offers the Tree Structure Evaluation/Risk Assessment Report for a homeowner’s peace of mind. It contains the following data:

  • tree species
  • size
  • species failure profile
  • evaluation of location and site of tree
  • visual tree analysis
  • wood rot-decay analysis
  • risk rating
  • interpretation of evaluation
  • remedial treatments

We can’t guarantee a tree won’t be taken down by severe, unpredictable weather but if your trees are showing any dangerous signs now you will be aware and can do something now before disaster happens.

Your report will be prepared by one of our certified arborists so you can be assured that it’s based on highly educated experience and scientific techniques.

Your valuable trees add so much to your property in beauty and the environment – but trees have liabilities associated with them. Be smart – the key to reducing those liabilities is to recognize when a tree becomes hazardous and take steps to correct or eliminate the hazard.

Should you have any unforeseen problems this winter, call Wood Acres Tree Specialists for Emergency Care. As a professional tree care company we employ the highest safety standards available and carry personal, property, and workers compensation insurance so you are protected. The average tree removal requires $100,000-$500,000 worth of equipment on site – we’re prepared to remove trees and stumps both large and small. If you have trees on your property, rely on Wood Acres Tree Specialists – we’re committed to being the best tree service in Montgomery County, Maryland and NW-DC  .

Invasion of the Brown Marmorated Stink Bug

Friday, October 1st, 2010

Brown Marmorated Stink Bug

Discovered in Allentown, PA in 1996, this insect has now made its home in over 25 States. It was quite prevalent early this spring, and then the unusually dry, hot weather must have helped propel it straight up the charts to #1 on our 2010 INSECT chart.

Reddish brown-black nymphs hatch from light-green eggs laid on either upper or lower leaf surfaces. After 5 nymphal stages, they become long shield-shaped brown adults with white markings on the hind end. If you want to see the adults just look around your house. They are sneaking in for the winter.
Pesticides don’t really work and wouldn’t last more than a few days to a week. Homeowners should concentrate on caulking and replacing screens to seal up those entranceways (good for saving energy, too) – as they enter through any crack they can find. Or, just get used to these relatively harmless insects – they don’t bite. It is true that when you crush a stink bug, they release a pheremone (that some say smells like stinky feet) that attracts even more stink bugs. It is better to help them find their way back outdoors without squeezing them and getting more pheremone in the air.
This year, “Cat-Facing” feeding damage from its sucking mouthparts has been noted on fruit trees and vegetable crops, affecting crop quality. Feeding on hundreds of hosts- the actual amount of damage caused by this feeding varies and the long-term effects of feeding on things like tree trunks is not well known.
So if you see a “Stink Bug”, don’t squash it or you’ll unfortunately find out how it got it’s name. Read more about it in our insect database at Wood Acres Tree Specialists.

Regular Pruning Saves Trees – & Money.

Friday, August 6th, 2010

Wood Acres Tree Specialists recently received information from Wayne Knoll, City Forester of Rockville, MD.  He was discussing the recent severe storms that had downed so many deciduous trees in his area of management and made an interesting observation:

According to Mr. Knoll,Rockville has approximately 28,000 street trees on 160 miles of street. His current budget allows for pruning all streets on about a 12-year cycle. During the February storm events, his office received approximately 200 reports of tree or limb failures. (Many of these failures were associated with evergreen trees, mostly white pine, in parks and on landscaped berms adjacent to major roadways. Since evergreens are more prone to failure due to excessive snowfall whether or not they have been recently pruned, he excluded these from his data). All trees listed below are deciduous street trees of various species and size. The majority of the failures were on maple species.

Of the 200+ tree related calls we received, 114 were for deciduous trees located in the City right-of-way along neighborhood streets. The vast majority of these were for partial tree failure with only a few whole tree failures.
  • Street trees that received routine maintenance pruning within the past five years incurred 19 of the known failures.
  • Street trees that have not received routine maintenance pruning for at least 6 years incurred 95 of the known failures.
Thus, 84% of the reported damage occurred on trees that have not received routine maintenance pruning for six or more years.

So, if you would like to significantly reduce your property’s tree failures during storm events, thus saving time, money and reducing liability  talk to us about regular maintenance for your trees – and keep them beautiful longer.