Treatment Type: Herbal and Nutritional Supplements
Rated for: Mixed Breed / Domestic
Ocala, Florida, United States
Posted Jun. 16, 2018
Black walnut trees produce a substance known as juglone. Juglone is highly toxic. The tree uses it to prevent consumption by herbivores, to kill insects, and to control aggressive vegetative growth around the tree.
Many people buy the hulls of black walnuts to sprinkle around their home to repel fleas. Yes, it can work to some degree but who wants to walk on shells? Also, juglone is toxic to humans and pets so there is always the risk that your cat might eat some of the hulls or a child might chew on them.
The hulls can be sprinkled throughout your yard to control fleas in the grass and flower beds.