Growing green thorns using bright green barrel cactus, and crosspollinating. Today I harvested the thorns and seeds. I grow in pack, 10 in each. Crosspollinating lower row against upper. I thought it was odd they didn`t stack at first, until I used dust on the different stacks. This is the result, all bright green: Prickly pear Fern Snowdrops Rushes Bulrushes Ponytail Lilies I thought barrel cactus crosspollinated with barrel cactus would produce.. well barrel cactus? Confused now.