Walnut companion plants (forum)

Jan starts with ...
I am wondering where to plant my walnut tree, and what to plant near it. I have read that many species are "allergic to walnut trees" and I would like a list of plants that can act as a buffer zone.

Time: 13th July 2009 4:05pm

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About the Author Jan
Kalamunda WA
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Jimmy says...
Its not that they are allergic, the walnut exudes a toxin from its roots.

So do not plant it anywhere other plants will be within range of its roots.



Time: 13th July 2009 5:31pm

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About the Author Jimmy
 
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Speedy says...
Its called Allelopathy.
Walnuts have an allelopathic effect on other plants.
I'd also like to know of species of plants that are more tolerant of walnut as I've just planted 4 trees.
I do know that apple trees really dont like it.
My brother has a a walnut tree 10-12yrs old in a garden.
Within 5 metres of the tree are growing white sapote (and seedlings coming up from fallen fruit), Euryops pectinatus, silky oak, Viburnum tinus, Callistemon sp., and Tagasaste.
There was both pomegranate and elder bush, but now dead, possibly due to shading as much as anything else.
There is a thick layer(15cm)of decomposing woodchip covering the whole bed.
All plants appear to be ok, white sapotes (3 trees) fruiting despite being in a bit much shade but could be doing better in more sun.


Time: 13th July 2009 10:41pm

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About the Author Speedy
Swan Hill, Vic
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Dekka says...
Hey Speedy, Copied this from an American site:-
Plants Observed to Be Tolerant to "Juglone" (ALLELOPATHIC BLACK WALNUT TOXIN)
Vegetables: lima bean; snap bean; beet; carrot; corn;
melon; onion; parsnip; squash.
Fruits: black raspberry, cherry.
Landscape plants: arborvitae; autumn olive; red cedar;
catalpa; clematis; crabapple; daphne; elm; euonymous;
forsythia; hawthorn; hemlock; hickory; honeysuckle;
junipers; black locust; Japanese maple; maple (most);
oak; pachysandra; pawpaw; persimmon; redbud; rose of
sharon; wild rose; sycamore; viburnum (most); Virginia
creeper.
Flowers and herbaceous plants: astilbe; bee balm;
begonia; bellflower; bergamot; bloodroot; Kentucky
bluegrass; Spanish bluebell; Virginia bluebell; bugleweed;
chrysanthemum (some); coral bells; cranesbill;
crocus; Shasta daisy; daylily; Dutchman

Time: 14th July 2009 7:17pm

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About the Author Dekka
Newcastle
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Speedy says...
Thanks Dekka, thats a handy list, and I'm sure that the ppl here could greatly add to the list with a bit of observation.
Today I saw a walnut orchard intercropped with onions for seed, a regular practice on that farm.
I was going to mention it here tonight but I see it's already on the list.


Time: 14th July 2009 8:40pm

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About the Author Speedy
Swan Hill, Vic
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peter says...
i know of a quince and walnut tree
growing side by side and both doing well.

Time: 14th July 2009 8:49pm

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Anji says...
I've just under planted a mature walnut with Calendula and Comfrey. The Calendula was from seed and isn't coming up quite in the quantity I'd hoped, but it is coming up (could be temperature related). A couple of stragly Calendulas has previously been in the root zone (untended).

Time: 2nd May 2011 1:08pm

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About the Author Anji
Australia
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ringelstrumpf says...
I just looked some up:
plants known to be affected by juglone:
asparagus, chestnut, apple,pear,rhubarb,blueberry, grape.
And NOT affected are these: onions, pawpaw ( the american paw paw)hazel, pecan, saffron, quince (?? didn't wok in your case), american persimon, Jerusalem artichocke, white mulberry, some cherries, elderberry, wild grapes.

I wonder if these plant are tolerant to gum trees too?

Time: 2nd May 2011 7:12pm

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About the Author ringelstrumpf1
Blue Mountains
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Luke says...
Hi Anji,

I want to plant walnut tree in my backyard. Do you know where (which shop) I can buy walnut tree?

Thanks
Luke

Time: 29th May 2011 3:52pm

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About the Author Luke2
Sydney
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ringelstrumpf says...
I would try Daleys as it is a graft it might (?) not grow that huge, because they are huge. There are not many possibilities in Australia.

Time: 30th May 2011 1:35pm

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About the Author ringelstrumpf1
Blue Mountains
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Charles cant spell says...
Yes I recon the Walnut down the farm would cover at least 500m2 alone and thats full dense canopy, funnily enough its now being dwarfed by a Paulwonia of epic size, dam there must be a lot of water under that area, or maybe the old dairies nutrients have been locked up by the walnut for years and the Paulwonia can actually get in under it and harvest them.

Time: 30th May 2011 2:56pm

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Original Post was last edited: 30th May 2011 2:57pm

About the Author Charlesstillcantspell1
Perth Innaloo
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Jan says...
After seeking advice a couple of years ago, I forgot to check back. Thanks, everyone for your assistance. In the meantime I did plant two walnut whips but they succumbed over summer to our extreme heat and shortage of water. I've heard that mulberry trees are compatible with walnuts.

Time: 16th June 2011 2:53pm

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About the Author Jan
Kalamunda WA
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