Composting Supply Store Welcome to the Composting Supply Store. Proceeds from the sale of composting supplies are used to support the San Diego Master Composter Program.

At this time, we are not processing credit card transactions or shipping outside of the USA. When you have completed your shopping selections, this store will generate a form that must be printed out and mailed to us along with a check or money order.

Solana Recyclers, Inc. (SRI) is a non-profit organization dedicated to environmental education, resource conservation, and sustainable agriculture. SRI administers the San Diego Master Composter program which trains volunteers in the art and science of composting and compost education. SRI also maintains a home composting hotline called the RotLine.