I agree that would make a great article...our greens workshop uses all types of fresh/dried plant material. We've used pinecones, dried herbs (Iavender, gray santolina, sage, thyme, hibiscus pods), dried flowers (goldenrod, celosia, echinacea seedheads, penstemon seedheads, money plant). As fresh greens, we use pine, juniper, firs, boxwood, holly, and some other specialty things we purchase (seeded eucalyptus, winterberry, etc). I'm amazed at people's creativity, as I don't have a creative bone in my body LOL.