Top Questions About Black Walnut Trees

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Questions About Black Walnut Trees

Asked by
Anonymous on
June 18, 2019

Q. How far away do I have to plant from walnut trees

My tomatoe plants are wilting.

Answered by
Downtoearthdigs on
June 18, 2019
Certified Expert
A.

Growing your plants out from under the canopy of the walnut trees would reduce the competition for sunlight and the chance of allelopathic affects from the fallen walnut leaves.

Because the roots of the trees can extend much farther than the foliar canopy, you may encounter tree root competition for water and nutrients, plus possible allelopathy from the root exudates.

It may be safer to plant in raised beds. But as you may know, there are other possibilities for wilting of tomato plants. Water deficit would be one; inadequate irrigation, or tree roots competition

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Asked by
Anonymous on
August 10, 2019

Q. What would cause healthy appearing limbs to break off my black walnut tree?

Our very mature black walnut tree has recently lost a few branches and limbs that appear healthy with abundant green leaves and fruit. The tree was trimmed a year ago. There have not been any destructive storms.

Answered by
GKH_Susan on
August 11, 2019
Certified Expert
A.

There are several possibilities.
If the pruning was extreme crown reduction, last year or sometime in the past, with stub cuts that re-sprouted, it is common that the re-sprouted growth is not well attached and will develop structural defects and potential breaking points. There are other reasons for defects:
major crown reduction - radical topping that exposes the woody stems to sunlight will scald the bark and kill underlying living tissue which progress into wood decay and potential breakage.
Over burdened branch end-weight is sometimes neglected by tree workers; the end-weight can create susceptibility for breakage.
Nutrient deficiencies - example: Calcium is important for cell wall strength and therefore structural integrity. Boron is important for Calcium metabolism. These minerals leach from the topsoil with rain and irrigation. Soil fertility is a vital consideration.
Summer branch break phenomenon. Foliage and wood is at its maximum weight from water uptake in spring and summer. This added weight can predispose the branch to breakage even without defects.
Here is more:
https://www.gardeningknowhow.com/ornamental/trees/tgen/dry-brittle-tree-branches.htm

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Asked by
Anonymous on
October 16, 2019

Q. What is the life span of a black walnut tree?

My black walnut tree is approximately 3 ft in diameter and taller than my three-story house. How long can I expect it to last?

Answered by
MichiganDot on
October 16, 2019
A.

In good soil, a black walnut lives an average of 150 years but some reach 250. Enjoy your tree.

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