planting after black walnut

[trapper]

Got this from my friend. I answered the sticker question and told him I would get the rest of the information about planting apples after removing black walnuts from the pros.  The black walnuts are in Wisconsin not Africa.
Thanks Marv


From: Rick Slager <rei@africamail.com>
To: "marvin christensen" <joymarv123@att.net>
Date: Friday, March 30, 2012, 2:32 PM


Hi Marv,

Thanks. What are stickers?

I'm looking at taking down around 12 or so...if i remove the stump...how long you think i have to wait before i plant apple trees? 1-2 years?

[BaldBob]

One to 2 years should be plenty if you get plenty of rainfall to leach out the Juglans poison that the trees put out in their leaves and nut husks.  It will help alot if you remove all Walnut leaves and husks from ground the as soon as possible.

[Ron Wenrich]

The toxins are also put out by the roots, if I'm not mistaken.  You would want the roots to not be active.  They have a term for it called walnut wilt.  Certain trees, vegetables and flowers are sensitive to juglone.  Apple is one of them.  A couple of years should help leach the soil.  It depends on the soil type. 

Here's an article from Purdue University that may give some insight:

http://www.treeboss.net/juglone.htm

And one from Ohio State:

http://ohioline.osu.edu/hyg-fact/1000/1148.html

[trapper]

Thanks:  copied the replys  and sent them to my friend
Marv

[Okrafarmer]

Don't know if this is an appropriate place to ask, but something I've been wondering for a while-- what species of trees will grow safely with walnuts, and not be affected (much, enough to matter) by the poison? Was wondering if ERC was one, and what others might be.

[WDH]

Check out the articles referenced in Ron's post.  Both articles give you a list of compatible species.

[sandhills]

I was wondering the same thing as Okra, there seems to be a little conflicting evidence though as I read the two links, one says lilacs grow good around the walnut the other says they won't.  Only reason I say this is because I planted some walnuts last fall and they seem to be sprouting good but I also have some fruit trees next to them and was wondering if a row of something (such as lilac) between them would help.  I used lilac as an example because my wife loves them.  By the way Okra, only thing around here that will guarantee a good kill on ERC is if you try and plant them in a row  ;).

[Ron Wenrich]

I would think that the major problem would come in where the rootlets come in contact with each other.  Fruit trees would be ok until the trees get bigger and their roots start to intermingle.