Introduction

Walnut trees are a common sight in many gardens and landscapes. They are known for their tasty and nutritious nuts as well as their beautiful foliage. However, it is important to know that certain plants do not grow well under a walnut tree. In this article, we will take a closer look at what plants grow under a walnut tree.

Why some plants don't grow under walnut trees

Walnut trees produce a chemical compound called juglone, which is toxic to certain plants. Juglone is found in all parts of the tree, but it is most concentrated in the roots, hulls, and leaves of the tree. When juglone is released into the soil, it can inhibit the growth of certain plants by interfering with their ability to absorb nutrients and water.

Plants that grow well under walnut trees

Although some plants are sensitive to juglone and do not thrive under walnut trees, there are still many plants that can grow well in this type of environment. Here are some plants that are known to tolerate juglone:

Grasses: Perennial ryegrass, fine fescues, and tall fescues are all great choices for planting under walnut trees. They are not affected by juglone and can help absorb excess nutrients from the soil.

Ferns: Lady ferns, royal ferns, and ostrich ferns are all ferns that can tolerate juglone. They add texture and interest to the garden and do well in the shade of the tree.

Flowers: Certain flowering plants, such as impatiens, pansies, and zinnias can grow under walnut trees. These colorful plants can add a pop of color to the garden and attract pollinators.

Vegetables: There are a few vegetables that can tolerate juglone, including asparagus, beets, and carrots. These vegetables can be planted on the edges of the garden, away from the shade of the tree.

Plants to avoid planting under walnut trees

While there are many plants that can grow under walnut trees, there are some plants that should be avoided. Here are some plants that are sensitive to juglone:

Tomatoes: Tomatoes are highly sensitive to juglone and should never be planted under a walnut tree.

Peppers: Peppers are also sensitive to juglone and should be avoided.

Blueberries: Blueberry bushes are very sensitive to juglone and should not be planted under a walnut tree.

Azaleas: Azaleas and other acid-loving plants are sensitive to juglone and should be planted elsewhere in the garden.

Caring for plants under walnut trees

Planting under a walnut tree requires some special care to ensure that the plants thrive. Here are some tips for caring for plants under a walnut tree:

Water regularly: Walnut trees have a shallow root system, which means that they can compete with other plants for water. Make sure to water regularly, especially during dry spells.

Fertilize sparingly: Walnut trees produce a lot of natural fertilizers, which can be beneficial for other plants in the area. However, make sure not to over-fertilize, as this can cause other problems.

Prune the tree: Pruning the walnut tree can help increase air circulation and sunlight in the area, which can benefit other plants.

Conclusion

While some plants do not grow well under walnut trees due to the presence of juglone, there are still many plants that can thrive in this environment. By choosing the right plants and providing them with the care that they need, you can create a beautiful and thriving garden under your walnut tree.