Ecology Action
www.growbiointensive.org

The main organisation behind truly sustainable biointensive farming.

Bountiful Gardens
www.bountifulgardens.org

A great source of open-pollinated seeds.

Southern Exposure Seed Exchange
www.southernexposure.com

Seed-saving organisation that has an extensive collection of heirloom and other open-pollinated vegetable seeds.

Método de Cultivo Biointensivo - Centro de Recursos
www.cultivobiointensivo.net

Resources in Spanish for taking up and teaching biointensive farming.