Ivy will do no damage, but many find it unsightly. It takes nothing
from the tree~~ only support. It can hide disease but also provides nesting
sites. Take your choice!!
Best Wishes Brian.
:) > Hello,
:) > I have a few trees in my yard, oaks and pines, that have english ivy
:) > climbing up the trunks.
:) > Is this OK for the trees?
:) > Thanks in advance,
:) > Vin~~~
:) Ivy will do no damage, but many find it unsightly. It takes nothing
:) from the tree~~ only support. It can hide disease but also provides nesting
:) sites. Take your choice!!
:) Best Wishes Brian.
As the ivy grows into the tree it blocks out the sunlight off of the
bark, which in turn keeps the activation of dormant buds from happening
along with the development of new buds which produce new leaves, which
Here's my article "About Ivy Climbing Trees":
The short answer is it is harmless with very few exceptions. Certainly
covering the bark has no effect whatsoever on photosynthesis & buds are
fed from the roots not from the sun. If ivy could cover the a tree to the
dripline hiding the leaves that'd be a problem, but it is not inclined to
do that. There are a couple reasons to not keep such ivy, addressed in the
"climbing trees" article, the main one being that ivy increases wind
resistance & increases blow-down of shallowly rooted trees.
There's also the issue of "invasive vs non-invasive ivy" covered here:
Frequently what people have is just nasty, nasty ivy that harms the
environment (unless you live where it is truly native & its a proper part
of an ecosystem adapted to it). It poisons birds & seeds into nearby
woodlands displacing native plantlife. If this is the one climbing the
then just get rid of it & replace it with non-invasive cultivars, which
tend to be prettier anyway with great variety.
-paghat the ratgirl
Get your Paghat the Ratgirl T-Shirt here:
On Sat, 19 Nov 2005 18:41:35 -0800, firstname.lastname@example.org
No, latent buds are stimulated by sunlight. If the ivy is on the
trunk--no biggie. Once it starts creeping out on the branches, you
get the same effect as "lion-tail" pruning: lots of long, narrow
branches with a few leaves at the ends, which break easily, and which
have no interior branches to preserve when they do break.
And, as was mentioned, it can provide camouflage for decay/disease and
creates a nice, moist microclimate that might harbor spores, insects,
or other bad stuff.
Also, some ivy tends to wrap around branches and create a "noose,"
strangling the branch beyond it.
If you maintain the ivy so it doesn't creep into the upper canopy, you
could keep it without much trouble (probably), but the most
tree-friendly approach would be to get it out and keep it out.
ISA Certified Arborist #TX-235AT
(who has a tree with Haedra helix growing up to the first couple of
layers of branches because his wife likes it that way)
Keith, Just be aware that some thin barked species (e.g. Tilia) may
photosynthesize via the cortex under the bark. Also, sudden removal of
ivy may cause sunscorch to these thin barked species....
Bad stuff? Spores and insects are just as important as trees, are they
not? Other wise some good comments about hiding decy/cavities. I spend
a lot of time with my x-ray specs on trying to see through the ivy on
many trees in high occupancy target areas!
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