I'd like to pick your brains a bit. I've got a long switchback road/trail that goes down my property and I'd like to line it with some sort of plant or plants. Here's the catch and requirements. It's gotta be able to take full sun, use no water once established (we get about 10" annually here), and I need to be able to easily propagate it so that I don't have to buy a thousand plants to line the road I can just continue to propagate it over the years. Think along the lines of Geraniums. These grow with no water even on my rocky hill and I can just cut them and plop them in and they'll take anywhere. Got any bright ideas? I've got a white shrub that's sorta like a Desert Marigold but it's got a super white glaucous covering all over it. It survives with no water right in the rocks but I don't know about propagation. What are you thinking?