Re: Toxic mulch

Contained in Jon L Jaussi's latest missive was:

> I have heard that some tree leaves produce toxins and are not good to use
> as mulches.  What ones are they?

Black walnut tree leaves contain a chemical called juglone that
inhibits the growth of other plants.  For this reason black walnut
leaves should be composted before use.  However, squash have
been observed to be tolerant of juglone.

References:

http://www.ppdl.purdue.edu/ppdl/expert/Juglone.html
http://www.agcom.purdue.edu/AgCom/Pubs/HO/HO-193.pdf

Shaun

-- 
"The easiest way to deal with a Word attachment in email is to delete it."
                                                            --BAPper

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