Choosing a tree should be a well thought-out decision. Tree
planting can be a significant investment in money and time. Proper selection can
provide you with years of enjoyment as well as significantly increase the value
of your property. An inappropriate tree for your property can be a constant
maintenance problem or even a hazard. Before you buy, take advantage of the
abundant references on gardening at local libraries, universities, arboretums,
parks where trees are identified, native plant and gardening clubs and
nurseries. Some questions to consider in selecting a tree include:
- What purpose will this tree serve? Trees can serve numerous
landscape functions including beautification, screening of sights and
sounds, shade and energy conservation and wildlife habitat.
- Is the species appropriate for your area? Reliable
nurseries will not sell plant material that is not suitable for your area.
However, some mass marketers have trees and shrubs that are not winter hardy
in the area sold. Even if a tree is hardy, it may not flower consistently
from year to year at the limits of its useful range due to late spring
freezes. If you are buying a tree for the spring flowers and fall fruits,
this may be a consideration. In warmer climates, there may not be a long
enough period of cool temperatures for some species, such as apples, to
develop flowers. Apples and other species undergo vernalization – a period
of near-freezing temperatures that cause changes in the plant, resulting in
the production of flowers.
Be aware of microclimates.
Microclimates are very localized areas where weather
conditions may vary from the norm. A very sheltered yard may support
vegetation not normally adapted to the region. On the other hand, a
north-facing slope may be significantly cooler or windier than surrounding
areas and survival of normally adapted plants may be limited.
Select trees native to your area. They will be more tolerant
of local weather and soil conditions, enhance natural biodiversity in your
neighborhood and be more beneficial to wildlife than many non-native trees.
Avoid exotic trees that can invade other areas, crowd out native plants and
harm natural ecosystems.
- How big will it get? When planting a small tree, it is
often difficult to imagine that in 20 years it could be shading your entire
yard. Unfortunately, many trees are planted and later removed when the tree
grows beyond the dimensions of the property.
- What is the average life expectancy of the tree? Some trees
can live for hundreds of years. Others are considered "short
lived" and may live for only 20 or 30 years. Many short-lived trees
tend to be smaller ornamental species. Short-lived species should not
necessarily be ruled out when considering plantings. They may have other
desirable characteristics, such as size, shape, tolerance of shade, or
fruit, that would be useful in the landscape. These species may also fill a
void in a young landscape, and can be removed as other larger, longer-lived
species mature.
- Does it have any particular ornamental value such as leaf
color or flowers and fruits? Some species provide beautiful displays of
color for short periods in the spring or fall. Other species may have
foliage that is reddish or variegated and can add color in your landscaping
year round.
Trees bearing fruits or nuts can provide and excellent
source of food for many species of wildlife. However, some people consider
some fruit and nut bearing trees to be "dirty".
- Does it have any particular insect, disease or other
problem that may reduce its usefulness? Certain insects and diseases can be
serious problems on some desirable species in some regions. Depending on the
pest, control of the problem may be difficult and the pest may significantly
reduce the attractiveness, if not the life expectancy, of the plant. Other
species such as the silver maple (Acer saccarium) are known to have weak
wood that is susceptible to damage in ice storms or heavy winds.
- How common is this species in your neighborhood or town?
Some species are over-planted. Increasing the natural diversity will provide
habitat for wildlife and help limit the opportunity for a single pest to
destroy all plantings. An excellent example of this was the American elm (Ulmus
americana). This lovely tree was widely planted throughout the United
States. With the instruction of Dutch elm disease, thousands of communities
lost all their street trees in only a few years.
- Is the tree evergreen or deciduous? Evergreen trees will
provide cover and shade year round. They may also be more effective as a
barrier for wind and noise. Deciduous trees will give you summer shade but
allow the winter sun to shine in. This may be a consideration for where to
place the tree in your yard.