Simple, fertilizer is measured by weight. 5-5-5 contains 5 lbs each of NPK and 85 lbs of inert material. 10-10-10 contains 10 lbs each of NPK and 70 lbs of inert material. Just us half as much. Dave TLCC http://www.tough-love.com > If I wanted to feed my chiles some 5-5-5 and all I have is 10-10-10, > Is there any feasable way a home gardener can do this? > > Thanks > Byron