Top Questions About Walnut Trees

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Questions About Walnut Trees

Asked by
Cwhyankee on
August 23, 2017
Bristol area

Q. Poorly walnut tree

Our established walnut tree, over 40 years old, has transformed over the last three years from a robust prolific fruitier to a wane, sparsely leafed anemic tree. Many years before we had it professionally pruned and are very concerned as to what we need to do to restore to its prior majesty?
Can anyone help?

Answered by
Downtoearthdigs on
August 25, 2017
A.

You will want to inspect the leaves, branches and trunk for signs of pest or disease.

You should also contact your County Extension Office to see what regional issues are in Walnut Trees.

https://www.gardeningknowhow.com/extension-search/

http://extension.oregonstate.edu/gardening/node/1027

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Asked by
Anonymous on
September 9, 2017

Q. Walnut trees

Our walnut trees must ooz a black liquid. anything under or near them have blackspots/or more covering it. Our deck railing gets black. It can be washed off mostly but not completely. Is there a way to prevent this? The flowers below the trees grow great in the summer, but now this black stuff is all over them.

Answered by
BushDoctor on
September 10, 2017
Certified Expert
A.

Be cautious about planting near black walnut. They emit a chemical from their roots called juglone. This chemical is toxic to most plants. Here is an article that will help:https://www.gardeningknowhow.com/edible/nut-trees/black-walnut/black-walnut-compatible-plants.htm

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Asked by
tedwestling on
September 19, 2017
54561

Q. fertilization

Can you mix an English walnut with a Black walnut ? I have had one of each die.

Answered by
BushDoctor on
September 19, 2017
Certified Expert
A.

Technically they can cross. Label branches that you purposely cross pollinate, and plant seeds outdoors in pots. Label everything. Some of them can end up being a cross between the two.

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Asked by
Anonymous on
May 17, 2018

Q. walnut trees

Is it possible to rejuvenate a walnut tree that suffered from drought conditions. It has a few leaf sprigs, but not many?

Answered by
Downtoearthdigs on
May 17, 2018
A.

These articles will refresh you on the care requirements.
Check soil moisture levels.
A soil test can help you determine if soil amendments are needed.

https://www.gardeningknowhow.com/edible/nut-trees/black-walnut/planting-black-walnut-trees.htm

https://www.gardeningknowhow.com/edible/nut-trees/walnut/planting-walnut-trees.htm

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Asked by
Anonymous on
July 14, 2018

Q. Walnut tree

I have a beautiful walnut tree that has always given walnuts every other year. This year I can see walnuts again, although I had them last year also. What’s going on?

Answered by
Downtoearthdigs on
July 17, 2018
A.

Several cultural factors can influence flower production, fruit set, and fruit maturation. Because female flowers are formed within the dormant buds when the current year's nuts are rapidly enlarging and filling, the immature flowers must compete with the nuts for carbohydrates produced by the leaves. Cultural practices such as fertilization increase the number of new flowers formed in the buds.

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Asked by
rwriley on
July 31, 2018
46777

Q. Young Walnut trees are sick

The trees are young, about 4\” in diameter. We thought they were dead, but now (Late July) they starting to leaf out – but very sparsely. We *Suspect* that our landscaper over-did the roundup last fall when we tore out the weeds and put mulch around them.

This Spring I was ready to drop the trees, but now I\’m seeing leaves. Is there anything I can do to help the trees along. BTW – I have 2 other trees (not sure what kind), that are completely dead – I think.

Rich

Answered by
drtreelove on
August 1, 2018
A.

Water and fertilizer is about all you can do. Wait and see.

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Asked by
hmquirion on
August 14, 2018
P7E 1Y2

Q. Butternut trees?

I’m looking at planting a butternut tree/white walnut in my backyard… I discovered them because of their beautiful foliage. I do have a few questions about their toxicity and if it applies to animals (dogs in particular) and yield of nuts. Also I have heard that walnut trees can be a hassle to maintain but I’m not sure how reliable to source is, any guidance/ opinions would be appreciated!

Answered by
BushDoctor on
August 15, 2018
Certified Expert
A.

Walnuts can be quite aggressive in many climates. They will grow on their own but they will become quite large quite fast.

The toxicity applies to the soil, mostly. Although the nut's flesh can be mildly irritating, it won't cause any harm to animals or humans. This toxin affects other plants in the area. It will have a large impact on tomatoes, potatoes, and anything else solanacious, as well as many other plant species.

This article will help: https://www.gardeningknowhow.com/edible/nut-trees/walnut/growing-butternut-trees.htm

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