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?
Here is an article that you may find helpful: https://www.gardeningknowhow.com/ornamental/trees/tgen/weed-trees.htm
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.
Rose of sharon, hydrangea and forsythia can tolerate these conditions.
What shrubs (~5' max height) can I plant under a Black Walnut tree? I want to create a dense bird cover planting.
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
Are black walnut shavings okay to use for mulch? Are there any harmful side effects for plants of any kind?
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.
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.
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
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?
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?
There are many reasons this would happen. This article will go over what it could be and will be helpful: