Can I Plant Daisies Under a Black Walnut Tree?

Black walnut trees (Juglans nigra) provide shade and beauty to many landscapes, but they also have a reputation for being toxic to some plants. The toxin, called juglone, is found in all parts of the tree but is most concentrated in the roots. So, can you plant daisies (Bellis perennis) under a black walnut tree? The answer is yes, but with caution.

Understanding Juglone Poisoning

Juglone is a natural compound produced by black walnut trees as a defense mechanism against pests and other plants competing for resources. When exposed to juglone, some plants may develop wilting, yellowing, or stunting of growth, and even death. That’s why it’s important to choose plants that are resistant or tolerant to juglone if you’re planting under or near a black walnut tree.

Daisies and Juglone Tolerance

Daisies are known for their cheery, white-and-yellow flowers and low-maintenance nature. Although daisies are not immune to juglone, they are considered moderately tolerant and can grow near black walnut trees without experiencing significant damage. The key is to plant them in areas with well-draining soil, ample sunlight, and sufficient water.

Tips for Planting Daisies under a Black Walnut Tree

If you want to plant daisies under a black walnut tree, here are some helpful tips:

Choose cultivars that are known to be juglone-tolerant, such as 'Snowdrift,' 'Pomponette,' and 'Robella.'

Plant daisies away from the drip line of the black walnut tree, where the concentration of juglone is highest. A good rule of thumb is to plant at least 50 feet away from the tree.

Amend the soil with compost, peat moss, or other organic matter to improve drainage and fertility.

Water daisies deeply and frequently, especially during hot and dry weather.

Monitor the plants for any signs of juglone poisoning, such as leaf spots, discoloration, or wilting, and remove any affected leaves or plants promptly.

Conclusion

In summary, it is possible to plant daisies under a black walnut tree, but it requires careful planning and execution. By selecting juglone-tolerant cultivars, planting in well-draining soil, and providing sufficient water and sunlight, you can enjoy the beauty of daisies without compromising the health of your black walnut tree or other nearby plants. If you’re unsure about which plants are safe to grow under a black walnut tree, consult with a garden expert or horticulturist for advice.