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Re: [PRIMROSES] PUTTING YOUR TREE TO BED/COLUMBUS/NEW YEAR

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>Use of fungicides can kill the mycorrhizae associated with the trees roots.
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Does mycorrhizal fungus reliably associate with tree roots - like
nitrogen-fixing  bacteria does with sweet peas, at least by the second year
- or is it only sometimes present, depend on certain conditions to attract
it, or less likely to find with certain species, etc.?  The reason I ask is
that it may be that the fine roots of Cyprepedium spp. might do well under
trees, if that fungus is present; after all, it's a woodland plant.

BTW, thanks to all who contributed to the discussion on bedding around
trees.  I know now what is killing my double ash.  We installed our 'pond'
(3' deep) about 4' from the trunk base and planted hostas at the base of
the tree on one side.  The other sides are met with an old planting of ivy.
 Had you all not given me the proper information, I would have made the
pond into a bog, permanently blocking tree roots from getting near the soil
surface on one side, while the ivy choked out the other sides.  As it is, I
now know what to do to rehabilitate the tree.  I hope it is not too late.

Sheila S.
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