Shade trees do not all necessarily shed their leaves
in the fall (deciduous), but some shade trees are evergreen, and others
can be classified as flowering trees. The fact that shade trees can
cool temperatures in the surrounding landscape and cool off houses
during the heat of the summer is well known. Some evergreen trees also
provide shade all year, a factor that may be undesirable in some cases
during hard winter freezes, when an evergreen shade tree may block off
the heat rays from the sun that might melt snow and ice from a house
roof or prevent infra-red light from warming rooms inside the house.
Extreme southern states home owners in the United States may prefer
shade on homes and buildings year round, and such evergreen shade trees
as Live Oak tree, Quercus virginiana; Laurel Oak tree, Quercus
laurifolia; and Darlington Oak trees,Quercus hemisphaerica, would be
desirable for planting near houses.
Pine trees are also valuable
shade trees for houses and landscape gardens. Such perennial shrubs as
Camellia japonica and azalea shrubs must have year round shade for
proper flowering. The camellia shrub and the azalea plant will survive
only on rare occasions if planted in the full sun. The dogwood and
redbud trees benefit from pine tree shade where they flower abundantly.
The cherry laurel tree, Laurocerasus caroliniana Ait, is an evergreen
shade tree that is covered with fragrant white flower clusters in
March. The cherry laurel tree is a fast growing tree, sometimes growing
6 feet per year. Eucalyptus trees, Eucalyptus cinerea, are evergreen
shade trees, but the 'Silver Dollar' eucalyptus tree usually is limited
to planting in the warm temperatures of zones 8-11. The exceptional
menthol fragrance of all parts of the eucalyptus tree makes it
especially desirable where smog and other air pollution is problematic.
The loblolly bay tree, Gordonia lasianthus, is often called the
loblolly bay magnolia tree, and the flower fragrance, white color, and
form look like a miniature flower bloom of the magnolia.
The
southern magnolia tree, Magnolia grandiflora, is an outstanding shade
tree known for the gigantic 1 foot wide fragrant white flowers during
the summer and the glowing green waxy magnolia leaves that provide
dense shade. Because of the dense shade and the mats of succulent roots
that rise to the ground surface (like cypress tree roots), few shrubs
or perennials can be successfully planted and grown underneath the
Magnolia grandiflora trees. Other shade trees that could also qualify
as beautiful flowering trees are black locust, Robinia pseudoacacia,
shade trees that are covered with fragrant white flower clusters-just
following the appearance of the fern-like, light green leaves. The
black locust trees leaf color changes to bright yellow in the fall, and
the wood has been used as waterproofed split-rail fencing for
centuries. The empress shade tree, Paulownia tomentosa, (Blue Dragon
Tree, also Princess Tree) is also a flowering tree that produces
gigantic blue-purple flower clusters triangular in shape. The empress
tree is known as an extremely fast growing shade tree that has been
promoted by former President Jimmy Carter. The wood is valued as very
strong and light weight; desirable in the Far East for furniture
manufacture and wood carving.
Maple trees and Oak trees offer
many species for shade and leaf change color in the fall. The maple
leaf color can change to yellow, orange, and red. The Oak tree leaf
color can vary from red, to orange, to yellow-gold, to brown. The
Florida maple, Acer barbatum, shade tree turns a brilliant yellow color
in the fall and then turns brown and remains on the tree most of the
winter. Other important shade trees are the American elm tree, Ulmus
americana, and the drake elm, Ulmus parvifolia 'Drake,' both coloring
yellow-gold in the fall. The winged elm tree has strange scaly winged
growths on stems and branches that are in demand by florists for their
ornamental value in making dried arrangements.
The Chinese elm
tree, Ulmus parvifolia, is known for its fast growth to provide quick
shade. The Chinese elm is one of the easiest shade trees to transplant
and can grow over 6 feet in one year if cared for properly. The
American Hophornbeam, Carpinus caroliniana, is an under-planted shade
tree that, during the fall leaf change, glows brightly in yellow-gold
colors. The bald cypress tree, Taxodium distichum, is an excellent
clean shade tree widely adapted to grow well on a variety of soil
types. The bald cypress leaves do turn yellow briefly in the fall, but
the bald cypress small leaf size requires no raking. The pond cypress
shade tree, Taxodium ascendens, is a great tree to grow around
pond-houses and wetland gardens, but should not normally be grown in
well drained locations. The pond cypress roots rise from the water,
swollen and large and are called cypress knees.
The black gum
shade tree, Nyssa sylvatica, grows well in wetlands and the shade is
beneficial to many aquatic plants. The water tupelo (tupelo gum, also
sour gum) shade tree grows aquatically in many lowland wet sites. The
leaves of the black gum and the water tupelo shade trees turn
yellow-gold and orange in the fall. The Chinese parasol tree, Firmiana
simplex, forms an umbrella (parasol) canopy with large bat-shaped
leaves that turn brilliant yellow, then orange, in the fall.
The
catalpa tree (fishbait tree), Catalpa bignonioides, has been used for
centuries as a shade tree that attracts worms (fishbait) to be used in
fishing. The Chinese tallow tree, Sapium sebiferum, is a fast growing
small shade tree that produces a kaleidescope of colors on leaves in
the fall of yellow, red, orange, blue, and purple. The Chinese tallow
tree produces seedpods in the fall that look like popcorn after the
leaves fall off, thus it is called the popcorn tree. The corkscrew
willow, Salix matsudana "Tortuosa," and the weeping willow, Salix
babylonica, grow fast into shade trees with distinctive linear leaves
that turn yellow in the fall. The Ginkgo shade tree, Ginkgo biloba, is
one of the most famous of the shade and its brilliant yellow-gold
leaves that remain on the tree for a week or more when they fall to
form a bright yellow circle underneath the barren limbs. The ginkgo
leaves have been found fossilized in the Oriental archaeological
excavations. The green ash, Fraxinus pennsylvanica lanceolata, is a
fast growing shade tree useful as a landscape specimen. The lombardy
poplar tree, Populus nigra, is a fast growing tree, upright in form
that is planted as hedges and windbreaks in the Western United States.
The
river birch tree, Betula nigra, is a beautiful landscape tree with
unique flaking bark that is replaced by slick bark in the spring. The
river birch can be planted as a single trunk specimen or as a clump.
The sassafras shade tree, Sassafras albidum, grows fragrant parts
including the flower, bark, and the roots that were used during the
civil war to make sassafras tea that produced a narcotic effect on
wounded southerners. The Sourwood tree, Oxydendrum arboreum, and the
sweetgum shade trees, Liquidambar styraciflua, both produce spectacular
leaf color in the fall, both the sourwood and the sweetgum trees turn
yellow, orange, and red in progressing stages. The sycamore tree,
Platanus occidentalis, is perhaps one of the best trees for fast shade.
Sycamore trees can grow to 2 feet in diameter & 50 feet tall in 20
years.
Bamboo trees and bamboo plants have been used as shade
trees, privacy hedges, and borders. Bamboo plants grow rapidly and
40-50 feet (Timber Bamboo) and are useful as windbreaks as well as
shade screens for privacy that cover 180 degree focused light rays.
Annual flower beds are often planted in front of bamboo tree screens
for partial shade, and many shrubs and bushes grow well when placed in
front of bamboo tree screens, if the bamboo plants are the clumping
type.
Shade trees have been used through the ages to shade
landscapes, homes, buildings, or as shelter and food for wildlife. Some
shade trees offer extra benefits such as beautiful flowers or evergreen
foliage. Other shade trees can bear fruit, such as mulberry trees,
apple trees, pear trees, and the evergreen loquat tree. Still other
shade trees bear valuable tasty nuts, such as pecan trees, walnut
trees, and chestnut trees. Other than the shade benefit, bright leaf
color of the fall cooling off period, makes the planting and growing of
shade trees a pleasurable and worthwhile effort.
Learn more about various plants, or purchase ones mentioned in this article by visiting the author's website: TyTy Nursery