Black Walnut-sensitive plants

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PinetopPlanter Auburn Four Corners, PA(Zone 5a) Mar 24, 2009

Hello all -

I have about 1/4 acre of a field (actually part back-yard) that is planted with Black walnuts. These are large trees (about 30 feet tall). I would like to plant various other ornamental trees and shrubs, but have had some problems due to the chemical(s) (Juglone, I believe, is the name of it) released by these trees from the roots. I had a pair of Paw Paws in the shade of them which did well for years (at least 7 years), then after a dought and subsequent heavy rainfall, they succumbed. I've had an ornamental cherry succumb. I don't want to cut these trees as they are valuable and ornamental in their own right. This season I would like to try daylilies and possibly a magnolia or two nearby. Does anyone have any thoughts or ideas about this?

I hope I've posted this in the right forum!

Thanks.

Post #6313360
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rcn48 Lexington, VA(Zone 6a) Mar 25, 2009

A quick search of Juglone tolerant plants led me to these sites: http://www.uwex.edu/ces/wihort/landscape/Juglone.htm, http://www.ext.vt.edu/pubs/nursery/430-021/430-021.html. Magnolia is not showing on the Trees and Shrubs list but Hemerocallis is on the list of perennials :)

This list also shows you those which are most sensitive to Juglone.
http://www.hort.wisc.edu/mastergardener/features/misc/walnuttox/walnuttox.htm

Post #6316248
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PinetopPlanter Auburn Four Corners, PA(Zone 5a) Mar 25, 2009

Thanks rcn48. I appreciate the post, and will check those lists out. I am a liitle wary, as a list I previously consulted did not list a plant that turned out to be susceptible, but I think this must not be an exact science (like deer eating plants that they're not supposed to eat . . . ). Again, thank you!

Post #6317561
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rcn48 Lexington, VA(Zone 6a) Mar 25, 2009

You're welcome :) I agree, it's not an "exact science", particularly when you're referring to the lists available of deer resistant plants. Every list I've ever checked indicates the Heuchera family as "safe", yet the deer mowed ours down this winter. If they're hungry enough, they'll eat almost anything :(

Post #6317594
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PinetopPlanter Auburn Four Corners, PA(Zone 5a) Mar 27, 2009

Yes, if they're hungry enough . . . even Mountain Laurel, which is poisonous to them (and the rest of us). I'm sorry to hear about the Heucheras, as I have been wanting to try them. Those colors look amazing in the catalogues.

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