As we anxiously await nature's
finest show, fall foliage, we may have noticed premature colors already
appearing on certain trees. While you may delight in seeing the early reds and
yellows, these changes can be a sign that your tree is
stressed.
Premature colors can be an indication that a tree isn't
vigorous enough to withstand insect and disease attacks. Occasionally only one
or two limbs of the tree will show premature fall color. This could mean a tree
already has a disease, weakening only the infected limbs. The more common
situation however, is for the entire tree to exhibit premature fall coloration,
which usually means root-related stress. A tree responds to this stress by
trying to curtail its above ground growth.
The record-breaking rains in
June blighted our maples, crabs, dogwoods and some ashes with fungus, resulting
in leaf anthracnose. They are experiencing early fall defoliation and little
color change due to their extreme weakened state. In addition, these trees could
have winter kill symptoms such as flower bud loss and selective branch dieback.
An organic fall fertilization is recommended to help their recovery next
spring.
Last season's severe drought, along with the hot, dry conditions
of September, numerous leaf diseases, nitrogen-leaching from a wet spring, are
all factors contributing to early fall foliage symptoms. If your trees are
experiencing any symptoms, it is best to contact a certified arborist for
specific advice for your trees.
So, how will our leaf-peeping season be
this year? The yearly variation in color intensity depends on different weather
conditions. Differing amounts of rainfall, sunlight, temperature, humidity all
affect how bright, how quickly and how long the season will be. With June's
abnormal amount of rainfall, and the extreme heat this summer and early fall, I
am predicting a moderate, less brilliant show this year. Even the apple and
pumpkin crops have been affected by June's rains. Nevertheless, fall is still a
spectacular time of year. And fortunately, there is always next
year!