Top Questions About Black Walnut Trees

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Questions About Black Walnut Trees

Asked by
Anonymous on
September 2, 2011

Q. Volunteer Trees

How do I get rid of these pesky volunteer trees growing under my Black Walnut tree? They are about 7 ft. now and such an eyesore?

Answered by
Nikki on
September 3, 2011
Certified Expert
A.

Here is an article that you may find helpful: https://www.gardeningknowhow.com/ornamental/trees/tgen/weed-trees.htm

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Asked by
joyceellen on
September 3, 2011

Q. Shrubs That Tolerate Shade and Black Walnut Tree

We want to plant shrubs and other plants along the foundation of our house. The front of the house faces south and has shade all day due to an oak tree, a giant cottonwood and a black walnut tree that is 3′ from the corner of the house. The west side of the house is mostly shade and the walnut is at the southwest corner of the house. We tore up all the landscaping 10 years ago and don’t remember what was planted there. We live in St. Paul, MN.

Answered by
Heather on
September 5, 2011
Certified Expert
A.

Rose of sharon, hydrangea and forsythia can tolerate these conditions.

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Asked by
lakotalady on
February 1, 2012

Q. compatable with black walnut

What shrubs (~5′ max height) can I plant under a Black Walnut tree? I want to create a dense bird cover planting.

Answered by
Nikki on
February 2, 2012
Certified Expert
A.

I believe you can plant hydrangea, forsythia and hibiscus near black walnut. Many trees, though they may reach over 5 ft., are compatible as well: arborvitae, flowering dogwood and Japanese maple are a few. This article may offer additional suggestions too: https://www.gardeningknowhow.com/edible/nut-trees/black-walnut/black-walnut-compatible-plants.htm

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Asked by
Anonymous on
March 23, 2012

Q. Black Walnut Mulch

Are black walnut shavings okay to use for mulch? Are there any harmful side effects for plants of any kind?

Answered by
Nikki on
March 23, 2011
Certified Expert
A.

All but a few plants can survive black walnut. Even when it is shredded for mulch, the wood will be allelopathic as it decomposes and kill many plants.

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Asked by
Nutmeg49 on
March 27, 2012

Q. What will grow around Black Walnut trees?

Trying to grow Hydrangeas and they keep dying. What do I need to know? And yes, I have a lot of Black Walnut trees in my yard.

Answered by
Nikki on
March 28, 2012
Certified Expert
A.

Black walnuts are poisonous to most plants, so it is possible that the soil near the tree and surrounding area has some toxicity which may be affecting your hydrangeas. You may need to consider moving your hydrangeas further away if possible or grow them in raised beds or containers. This article will also help: https://www.gardeningknowhow.com/edible/nut-trees/black-walnut/black-walnut-compatible-plants.htm

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Asked by
Litestyle0o on
April 8, 2012

Q. Is this a potato Vine?

This is a rogue plant that popped up in my garden this year. It kinda reminds me of a potato vine. Is it a Potato?

Photo: https://www.box.com/s/515e5e58c8774b6eb5b4

Answered by
Heather on
April 16, 2012
Certified Expert
A.

It is not a potato. It actually looks like a black walnut sucker. Did you have a black walnut growing near there that you cut down?

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Asked by
ndguy on
June 3, 2012

Q. Parts of my black walnut tree did not leaf out this spring

Some branches leafed out and others did not, about half of the tree did not leaf. Tree was very healthy in the fall and not sure if it will come back now. Any answers?

Answered by
Heather on
June 4, 2012
Certified Expert
A.

There are many reasons this would happen. This article will go over what it could be and will be helpful:
https://www.gardeningknowhow.com/ornamental/trees/tgen/tree-leafing-problems.htm

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