Introduction

If you have a black walnut tree in your yard, you should be cautious about what plants you grow near it. Black walnut trees have a unique ability to produce a chemical called juglone, which is toxic to many plants. The best way to avoid the negative effects of juglone on your plants is to know what not to plant near a black walnut tree.

Plants to Avoid

Before planting anything near a black walnut tree, you should know that the following plants are particularly sensitive to juglone:

Azaleas

Rhododendrons

Hemlocks

Japanese maple trees

Black raspberry bushes

Tomatoes

Peppers

Potatoes

Blueberry bushes

If you're determined to plant any of these species close to your black walnut tree, consider relocating the tree instead. Alternatively, you can try planting these plants in a spot that is farther away from the base of the tree, where the concentration of juglone is much lower.

Plants That Are Tolerant of Juglone

Despite the negative effect juglone can have on many plants, there are still some species that are able to tolerate the chemical. These plants include:

Beets

Carrots

Beans

Cucumbers

Corn

Lettuce

Onions

Peas

Squash

Spinach

Strawberries

If you're looking to plant any of these vegetables or fruits near your black walnut tree, it's important to note that the chemical toxicity can still lower productivity and restrict growth in some cases.

Alternative Landscaping Ideas

If you're looking to landscape around your black walnut tree, you may want to consider using non-plant alternatives. One idea is to use mulch or gravel around the base of the tree. Another option is to create a rock garden or install yard art or sculpture in the affected area.

Conclusion

Black walnut trees are a beautiful addition to any yard, but they require careful consideration when it comes to planting other vegetation near them. Knowing what not to plant near a black walnut tree can save you time and money, and can help you avoid losing desirable plants to juglone poisoning.