Introduction

Walnut trees are popular in Pennsylvania, providing a delicious nut and adding texture and color to landscapes. However, these trees also release a toxin that can harm other plants growing in close proximity. That raises the question - what plants can grow near a walnut tree in PA?

The Toxicity of Black Walnuts

Black walnut trees release a chemical called juglone, which is toxic to many plants, including vegetables and fruits. The chemical is especially potent around the roots of the tree, but it can reach up to 50 feet away. Citrus, roses, and many annuals and perennials are also sensitive to juglone. The toxin can cause yellowing of leaves, stunting of growth, and, in severe cases, death of the plant.

Plants That Grow Near Walnut Trees

Despite the toxicity of black walnuts, there are some plants that can tolerate it and grow near these trees. Here are some examples:

1. Ferns

Ferns are an excellent option as they are tolerant of shade and juglone. They also do well in moist soil. Ostrich ferns, maidenhair ferns, and royal ferns are good options for growing near walnut trees.

2. Oakleaf Hydrangea

Hydrangeas generally do not tolerate juglone, but the oakleaf hydrangea is an exception. This shrub produces beautiful blooms in the summer, and the leaves turn red in the fall.

3. Serviceberry

Serviceberry is a small tree or large shrub that produces white, star-shaped flowers in the spring and edible berries in the summer. It grows well in the shade of a walnut tree.

4. Hellebores

Hellebores are shade-loving perennials that are also tolerant of juglone. They produce lovely flowers in the winter and early spring and have attractive foliage throughout the year.

Conclusion

It is essential to choose the right plants when gardening near a walnut tree in Pennsylvania. Many plants are sensitive to juglone, but there are a few that can tolerate it. Ferns, oakleaf hydrangea, serviceberry, and hellebores are excellent options for adding beauty to your garden without harming your walnut tree.