I think this is a SUPER AWESOME IDEA!!
His Bios Urn is a biodegradable urn made from coconut shell, compacted peat and cellulose and inside it contains the seed of a tree. Once your remains have been placed into the urn, it can be planted and then the seed germinates and begins to grow. You even have the choice to pick the type of plant you would like to become, depending on what kind of planting space you prefer.