What to do about the Walnut Tree?

Date:   7/25/2014 11:14:16 AM ( 10 y ago)

What to do about the Walnut Tree?

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A story to be told.

noted July 24, 2014
9:14 pm


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California Black Walnut Tree - Juglans californica
Planting a California Black Walnut Tree requires you to consider the fact that they secrete a toxin called Juglone from their body parts. This toxin may stunt the growth of other plants growing near the tree. It is a brilliant evolutionary adaption (Allelopathy), shared by other plants such as Eucalyptus - which is ironically planted much more in Southern California than the native Black Walnut. Southern California walnut woodland is severely threatened by urbanization. I am after California natives, particularly San Diego county regions because I know how quickly they are losing habitat.

To Reduce the Effects of Toxin secreted by the Black Walnut trees:

* Regularly clean up all fallen leaves and fruit from the black walnut tree, keeping debris away from desired landscape plants.

* Compost plant debris to degrade any toxins present. If composting is impractical, do not use any part of the walnut tree as compost or mulch for other plants.

* Maintain high organic matter levels in the soil because organic matter encourages healthy soil microbial populations that can metabolize toxins.

* Plant tolerant trees, shrubs, vines, ground covers, flowers and grasses under walnut trees, or in areas that might contain walnut roots.



https://www.flickr.com/photos/mechanoid_dolly/4778923684/



Droughts are not uncommon, and all crops are irrigated. The main temperate fruit and nut crops grown commercially in this region are apple, macadamia, olive, peach, persimmon, and English walnut.

http://homeorchard.ucdavis.edu/backyard-climate.pdf

http://www.crfgsandiego.org/Presentations/NUTS%20FOR%20YOU.pdf

 

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