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- Path: sparky!uunet!ogicse!uwm.edu!ux1.cso.uiuc.edu!news.cso.uiuc.edu!uxa.cso.uiuc.edu!cl27111
- From: cl27111@uxa.cso.uiuc.edu (Christopher Lindsey)
- Newsgroups: rec.gardens
- Subject: Re: Black Walnuts On Lawn
- Keywords: walnuts, lawn, kill grass
- Message-ID: <BxwArs.JrI@news.cso.uiuc.edu>
- Date: 18 Nov 92 04:50:13 GMT
- Article-I.D.: news.BxwArs.JrI
- References: <BxvME1.5sx@gdls.CSCTMD.COM>
- Sender: usenet@news.cso.uiuc.edu (Net Noise owner)
- Distribution: usa
- Organization: University of Illinois at Urbana
- Lines: 43
-
- mccabe@gdls.CSCTMD.COM (Harold McCabe) writes:
-
- >I have a black walnut tree in my yard and this fall it dropped a lot
- >of walnuts onto my lawn. I picked them up and carted them off since
- >they were messy, kids would step on them and track them all over, etc.
-
- >Questions:
-
- > 1. Will the the nuts fall every year, or will this happen every other
- > year, or some other frequency? This is my first year in the house.
-
- > 2. If the nuts are left on the grass, will they kill the grass or
- > cause something else bad to happen?
-
- > 3. Taking off the hulls, drying the nuts out, cracking the nuts is a
- > lot of work. Is there any other use for the nuts besides squirrel
- > fodder?
-
- They will fall every year (hopefully), or else your tree is pretty
- sick...
- The nuts won't harm the grass any more than the tree will (more on
- this later).
- Black walnuts are supposed to be the most delicious walnuts known to
- man! (I think they're also the messiest...) They really don't provide any
- value, except that you'll have some new walnuts coming up in a few years...
-
- You asked if the nuts are harmful, and I gave a rather cryptic answer.
- Black walnut trees are allelopathic trees, meaning that they produce chemicals
- that will prevent the reproduction, growth, etc. of other plants in the area.
- The walnut does this through the secretion of a chemical called juglone, which
- prevents other plants from competing with it...
- Anyhow, juglone is highly toxic to tomato plants, and it's been my
- experience that it gives plants in the Rosaceae family a tough time too
- (such as roses, cherries, plums, apples, etc.) The best experience that I've
- had with plants under walnuts are those in the Saxifragaceae family, such as
- mock oranges, currants (don't plant female forms, they may cause white pine
- blister rust), hydrangeas, and deutzias...
-
- Boy, did I go off on a tangent, or what? ..
- \__/
-
- Christopher Lindsey -- Dept. of Landscape Architecture, Univ. of Illinois
- e
-