OMRI Approved – Effective against deer and several other pests! Repellent is all-natural and completely environmentally safe. Simply mix the powder concentrate as directed and spray it on the plants you want deer to avoid. The solution will not burn or damage delicate foliage. After 24 hours, the solution sets and is rainfast. Odor free and perfect for fruits, vegetables, other food plants and designated as suitable for use on organic crops by the Organic Material Review Institute. One pound of concentrate powder makes four quarts of spray.