Juglans

5 03 2009

A couple of walnut trees were planted where the goats mowed down the blackberries. Walnut trees excrete juglans from their roots and leaves which prohibits the growth of many plants. Blackberries are one of the plants that are severely affected. They better not grow back.
A couple dozen asparagus starts were planted to fill out the aspagus bed we planted seeds in last year.
We are preparing for the first big round of direct seeding of root crops and cool weather greens this weekend.

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5 responses

6 03 2009
Laura G

We have problems with juglans (although I never knew the name before) because of the huge Black Walnut trees on our property. That, and the squirrels like to bomb our house with the nasty nuts. Anyway, do you guys have any recommendations for plants that don’t mind growing around the walnut trees? Ground cover? Flowers? Herbs? Veggies?

Just thought I’d ask. Hope you’re all doing well!

6 03 2009
mudpuddlefarm

http://www.ext.vt.edu/pubs/nursery/430-021/430-021.html. The compatible plants are towards the bottom.

There is not so much in the way of vegetables that can be planted around walnut trees. But there are many other trees, shrubs, flowers, and vines that can be planted in proximity.
If you own the land, and really do not like the black walnut tree on your property they fetch a high timber value. Just a thought

7 03 2009
denise

julgans nigra or j. regia? just curious.. and did you guys buy these or dig them up…sounds like good stuff whatever the species..although english is easier to crack and more delicious i think..but what does that mean? hope all is well! trying to think of a time that works for you guys to come out here..let us know..peace!
swf

7 03 2009
mudpuddlefarm

We put in black walnut trees. We just bought them at the Coop. The English species in easier to crack, but they do not grow as well as the black varieties in this area. The black varieties are usually tastier than the English ones, at least in my experience.
We will make it out to your place soon, very soon.

10 03 2009
sillydog

It’s funny, I was just on another forum talking about allelopathy and juglone. All members of the genus make it. You’d think it’d leach away in our rainy winters, but it really doesn’t. Sadly, I’ve not noticed it having any effect on the Himalayan blackberries. In fact, most Rubus seem to be able to handle it. Alliums and chicories just don’t care. Solonacious crops wither just thinking of it, but walnut leaf compost makes a good potato vine killer if you were going to walnut-up that ground anyhow – seems to be a flamethrower would be the better choice.

Since most Persian/English walnuts are on a hybrid Paradox rootstock (part J. regia and part one of the other three “black” walnuts), there really is no difference. I’ve got a 100-year old own-stock walnut tree, and believe me, it’s plenty allellopathic.

Other things that grow well under walnut include papavar poppies, california poppies, bleeding heart, calladium/elephant ear, iris, crocosmia, and japanese maples. Bigger lists can be found at: http://ohioline.osu.edu/hyg-fact/1000/1148.html and http://www.uwex.edu/ces/wihort/landscape/Juglone.htm .

-Marie, SGC

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