How much will one bag of Amendment cover? Organics Alive Support January 23, 2020 21:49 A .25in thick layer covers 32 square feet. .5in layer cover 16 feet. Related articles Can I use organics Alive for my lawn, roses, fruit trees, palms, house plants, vegetable garden? Do you ship? Does OA give consultations? Who else uses OA products? Can I use it on seedlings and clones? Comments 0 comments Please sign in to leave a comment.