Re: quick questions
- To: perennials@mallorn.com
- Subject: Re: quick questions
- From: C* P* L*
- Date: Mon, 22 Mar 1999 01:41:54 -0600 (CST)
> 1. Can I use (safely) English Walnut leaves for compost or are they
> too toxic? If they rae toxic will it wear off with time?
> These are not Black Walnut leaves.
As I understand it, juglone (the allelopathic compound renowned for
killing tomatoes near black walnuts) is present in most members of
the walnut family, Juglandaceae. Juglans regia is no exception
to this rule...
Supposedly, only the husks and roots secrete the chemical.
I've seen lots of shallow-rooted plants die beneath walnuts, but
it's probably because of the sticky sap that drips to coat everything
beneath it (and thus sealing off the leaves of understory plants).
According to the Michigan State University Extension, toxicity
present in the soil will only remain for about one year, so
you should be doubly safe if you don't use the compost anytime soon.
> 2. I have a bamboo (sinarundinaria nitida). Does the new growth
> come from the bottom like all grasses? It stayed mostly green
> all year. I have had this only since summer and not sure if it will
> branch from the upper culms.
I have no idea. :)
Chris
P.S. Just as a reminder to everyone; there's a woodyplants list
for people with specific woody plants questions:
http://www.mallorn.com/lists/woodyplants/
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