I haven't seen those right around here, Mamabear. Supposedly they should be able to grow at around 10,000ft., but maybe they haven't been able to get a foothold here. I have seen them up north in the Williams Fork range where I camp a lot, but that's a couple thousand feet lower. We're a sub-alpine desert really, and it's hard for anything to grow out in the open or even in the house. Cactus does real good in the house.