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Failing Yew Tree

Hello Friends,

We have a problem and hope that one or more of you may have some helpful
ideas. At the front of our section - fully exposed to the sun - we have
an Irish Yew (Taxus baccata hibernica) which has been growing there for
over 30 years.

They are a slow-growing tree, but this prospered for many years and is
now about 15 feet high. Rather close to it (7-8 feet away) our neighbour
had a yellow ash tree, which occasionally stuck a branch into the yew,
but he was cooperative and cut these off.

Earlier this year however, he found that the ash was digging up his
expensive "blacktop" driveway and decided the tree had to go, and cut it
down.

Our yew has been looking less well for 2-3 years, which we attributed to
competition from the ash, but since the ash was cut down, it has looked
much worse, with the foliage becoming very thinned-out and a lot of it
going yellow.

We know that decaying ash roots are allelopathic to most other plants
near them, what we would like to know is, is there anything we can do to
save our yew tree? Is there anything we could apply around it that might
offset whatever the ash is spreading through the soil?

Tony & Moira
-- 
Tony & Moira Ryan <theryans@xtra.co.nz>
Wainuiomata, New Zealand
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