The farther I get into growing avocados, the more I appreciate the part of the tree that is hidden underground, the part with the roots, the rootstock. It is the engine of the tree, and it can be its armor. This post dives deep into the development story of one of the toughest avocado rootstocks. […] The post ‘Dusa’ avocado rootstock: the story appeared first on Greg Alder's Yard Posts: Southern California food gardening.