Here is an ol idea I heard years ago and have used every year since. When planting pepper plants, dig the hole about 4 inches deeper than normal. Into that hole, place the contents of a book of matches. Cover them up to the depth you would normally dig and plant your peppers as normal. Something about the phosphorous (sp) in the book match heads. By the time the roots get down deep enough to get to the matches, it is about the time they need extra phosphorous. Those plants will grow far better and produce more.