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Walnut Poisioning #7919509
08/03/23 10:49 AM
08/03/23 10:49 AM
Joined: Jan 2022
Posts: 1,731
Eastern W by God V
Crowfoot Offline OP
trapper
Crowfoot  Offline OP
trapper

Joined: Jan 2022
Posts: 1,731
Eastern W by God V
Hey Folks.
There are a few walnut trees at one end of my garden.
My dad always thought that the trees, (roots) somehow poisoned the soil nearby.
Even if the tree is cut down, do the roots live on and continue to contaminate the ground ?
Seems very few things grow well directly under them, like wild raspberries, but my tilled ground is 20' or more from the base.
I'd hate to cut them down, but will if necessary.
And, how to kill the stump and roots ? How long before there are no remnants to affect the crops ?
Thanks !

Re: Walnut Poisioning [Re: Crowfoot] #7919512
08/03/23 10:54 AM
08/03/23 10:54 AM
Joined: Aug 2008
Posts: 16,082
ny
U
upstateNY Offline
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upstateNY  Offline
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Joined: Aug 2008
Posts: 16,082
ny
I know you cant grow garlic near most any nut trees.But I don't have an answer to your problem.


the wheels of the gods turn very slowly
Re: Walnut Poisioning [Re: Crowfoot] #7919523
08/03/23 11:04 AM
08/03/23 11:04 AM
Joined: Nov 2017
Posts: 306
Siberia 🐁
T
Tatiana Offline
"Mushroom Guru"
Tatiana  Offline
"Mushroom Guru"
T

Joined: Nov 2017
Posts: 306
Siberia 🐁
You are talking about juglone toxicity.
,
Some people think that walnuts can concentrate iodine from soil, which they do, and that it's the iodine vapors they emit that kill the herbs underneath (especially when green nuts fall down and grass dies around them). In reality it's the juglone, which just happens to smell similar to iodine. It's the same substance that gives walnut hulls their dyeing properties. It's said to degrade in the soil/compost within 6 months.

Re: Walnut Poisioning [Re: Crowfoot] #7919532
08/03/23 11:12 AM
08/03/23 11:12 AM
Joined: Jan 2007
Posts: 2,117
B61-12 vicinity, MO
T
TreedaBlackdog Offline
trapper
TreedaBlackdog  Offline
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Joined: Jan 2007
Posts: 2,117
B61-12 vicinity, MO
Allelopathy is a common biological phenomenon by which one organism produces biochemicals that influence the growth, survival, development, and reproduction of other organisms. These biochemicals are known as allelochemicals and have beneficial or detrimental effects on target organisms.

Re: Walnut Poisioning [Re: TreedaBlackdog] #7919538
08/03/23 11:23 AM
08/03/23 11:23 AM
Joined: Dec 2006
Posts: 2,060
Lufkin, Tx.
L
Lufkin Trapper Offline
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Lufkin Trapper  Offline
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Joined: Dec 2006
Posts: 2,060
Lufkin, Tx.
Nothing grows well in the shade.


Billy
Member # 16.
Re: Walnut Poisioning [Re: Crowfoot] #7919541
08/03/23 11:25 AM
08/03/23 11:25 AM
Joined: Nov 2017
Posts: 126
Somerset Pennsylvania
F
FarmerDan Offline
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FarmerDan  Offline
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Joined: Nov 2017
Posts: 126
Somerset Pennsylvania
Like previously mentioned walnut trees produce juglone which can harm other plants around the tree. Although Iíve seen plenty of stuff growing around walnuts I canít imagine it be good for a garden. If youíre not have issues I probably wouldnít worry to much about it.

I havenít heard of other nut trees like hickoryís being allelopathic but walnuts and hickoryís are in the same family (Juglandaceae) so I wouldnít be to surprised if they did as well

Re: Walnut Poisioning [Re: Crowfoot] #7919561
08/03/23 11:50 AM
08/03/23 11:50 AM
Joined: Apr 2009
Posts: 11,814
South Ga - Almost Florida
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Swamp Wolf Offline
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Swamp Wolf  Offline
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Joined: Apr 2009
Posts: 11,814
South Ga - Almost Florida
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Never Half-Arse Anything!

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Re: Walnut Poisioning [Re: Crowfoot] #7919566
08/03/23 11:58 AM
08/03/23 11:58 AM
Joined: Feb 2020
Posts: 8,637
Indiana
P
Providence Farm Online content
trapper
Providence Farm  Online Content
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P

Joined: Feb 2020
Posts: 8,637
Indiana
I planted 26 tame blackberries about the drip line and out past the drip line. There are several walnuts are in that tree line. All the Blackberrys were dead in 2 years. Was it the walnuts? Now I don't plant near them.

Re: Walnut Poisioning [Re: Crowfoot] #7919576
08/03/23 12:06 PM
08/03/23 12:06 PM
Joined: Jan 2022
Posts: 1,731
Eastern W by God V
Crowfoot Offline OP
trapper
Crowfoot  Offline OP
trapper

Joined: Jan 2022
Posts: 1,731
Eastern W by God V
Very interesting, thanks !
Years back I ran a sub-soiler to break up the ancient hardpan and snagged some roots, 20' from the tree.
They were nasty, slimy bleeding, similar to the hulls on the nut.
I suppose there was a bit of that juglone there as well. But, that wouldn't likely be a problem till they were wounded ... or maybe when the tree was killed.

Thanks again,
smile

Re: Walnut Poisioning [Re: Crowfoot] #7919689
08/03/23 02:41 PM
08/03/23 02:41 PM
Joined: Dec 2006
Posts: 20,875
St. Louis Co, Mo
B
BigBob Offline
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BigBob  Offline
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Joined: Dec 2006
Posts: 20,875
St. Louis Co, Mo
Not only does a Walnut keep other plants from growing under and near them, the wood chips, bark and nut hulls are toxic to many animals especially Horses, and the husk's will kill fish if it get's in the water.

Last edited by BigBob; 08/03/23 02:41 PM.

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Re: Walnut Poisioning [Re: Crowfoot] #7919698
08/03/23 02:52 PM
08/03/23 02:52 PM
Joined: Feb 2020
Posts: 8,637
Indiana
P
Providence Farm Online content
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Providence Farm  Online Content
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Joined: Feb 2020
Posts: 8,637
Indiana
I worked with a guy when I did line clearance tree trimming that would get burns on his skin if he cut walnuts.

Re: Walnut Poisioning [Re: Crowfoot] #7919705
08/03/23 03:05 PM
08/03/23 03:05 PM
Joined: May 2009
Posts: 15,295
Champaign County, Ohio.
K
KeithC Offline
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KeithC  Offline
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Joined: May 2009
Posts: 15,295
Champaign County, Ohio.
Black walnut dust, from woodworking, makes me noxious, if I don't wear a mask. I like to eat black walnuts, especially in chocolate brownies and have no problems from eating them.

Two of my uncles, when they were kids, figured out they could use walnut branches, with leaves, to stun fish. They were beating the water with walnut branches, to drive fish into a net and the fish started to float up. Later on, they would poison small pools in creeks and collect the fish at the downstream end, after they were stunned by the juglone.

Keith

Re: Walnut Poisioning [Re: Crowfoot] #7919729
08/03/23 03:35 PM
08/03/23 03:35 PM
Joined: Nov 2013
Posts: 137
MO
S
SwiftKIll Offline
trapper
SwiftKIll  Offline
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Joined: Nov 2013
Posts: 137
MO
Something else to consider about black walnuts is that they are poisonous to animals like dogs and horses. If they eat the bark, leaves or nut's it will cause paralysis. My three Labs were running around with and chewing pieces of BW I cut for firewood as Labs will do. The next morning none of them could walk, their rear ends were paralyzed. I called the Vet and he said to have them drink a lot of fluids and it should flush through their system. It worked and by the evening they were much better. Just a FYI.

Re: Walnut Poisioning [Re: Crowfoot] #7919735
08/03/23 03:44 PM
08/03/23 03:44 PM
Joined: Dec 2022
Posts: 4,263
illinois
J
jalstat Offline
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Joined: Dec 2022
Posts: 4,263
illinois
Very interesting

Re: Walnut Poisioning [Re: Crowfoot] #7920151
08/04/23 06:21 AM
08/04/23 06:21 AM
Joined: Dec 2006
Posts: 8,033
Piney va. soon be 19
cotton Offline
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cotton  Offline
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Posts: 8,033
Piney va. soon be 19
deer and walnut trees is why we don't have our garden anymore


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ifin your gonna be dumb ya gotta be tough
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Re: Walnut Poisioning [Re: Crowfoot] #7920156
08/04/23 06:26 AM
08/04/23 06:26 AM
Joined: Dec 2014
Posts: 4,029
west virginia usa
R
randall brannon Offline
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randall brannon  Offline
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Joined: Dec 2014
Posts: 4,029
west virginia usa
Walnut trees and their nuts as well as their leaves are toxic to Horses and that is why they bare no where near my pastures. My Pastures are very lush and heavy Fertilized but I know that Walnut Trees will kill the grass as well as the Horses.


God please keep they 19 fallen UBB miners out of trouble up there.
Re: Walnut Poisioning [Re: Crowfoot] #7920161
08/04/23 06:31 AM
08/04/23 06:31 AM
Joined: Feb 2015
Posts: 10,313
Iowa
T
trapdog1 Offline
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Joined: Feb 2015
Posts: 10,313
Iowa
I know walnut trees are hard on some plants, but I've never seen them kill grass.

Re: Walnut Poisioning [Re: Crowfoot] #7920168
08/04/23 06:38 AM
08/04/23 06:38 AM
Joined: Jan 2018
Posts: 1,658
Henry Co, IL
3
3togo Offline
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3togo  Offline
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3

Joined: Jan 2018
Posts: 1,658
Henry Co, IL
Always had good grass on the lawn under walnut trees. But NO weeds.

Re: Walnut Poisioning [Re: Crowfoot] #7920177
08/04/23 06:57 AM
08/04/23 06:57 AM
Joined: May 2023
Posts: 33
Indiana
G
Gayle08 Offline
trapper
Gayle08  Offline
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Joined: May 2023
Posts: 33
Indiana
I have 2 pretty decent size walnut trees in my yard and there is plenty of grass and weeds that grow under them just fine, I donít have vegetables or flowers under them but havenít seen any negative effects on the grass with the exception of when all the nuts fall I have the kiddos put them in a pile and it will kill the grass once they start decomposing now Iím not sure if that is due to the husks and nuts or due to the fact that the area doesnít get much sunlight Iím not a scientist but if you donít have problems now with your garden I would leave em if you do I would personally move the garden before I cut down trees but do what ya want pretty sure if you cut em down you can take some copper nails and drive em into the stump all around and it should kill it in a couple years if you want it done sooner rent a stump grinder, grind them all down then dig down to remove the chips until you get to dirt and refill the hole with new dirt. It might not be copper nails I donít personally remember but I know my dad killed some trees growing up like that. Good luckÖ. Edit if itís a big tree you will need multiple nails also if you cut it down take the stump and drill multiple inch and half or 2 inch holes in it and you can fill em up with gas multiple times and it will kill it off.

Last edited by Gayle08; 08/04/23 07:03 AM.
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