I found a Black Diamond (Ebony Flame) a couple of months ago at Home Depot. First time I've ever seen it for sale here in Central Florida though I learned that it has been around for a few years. Mine is doing well and doesn't seem to be affected by our salty air. When I bought it, the plant had a few blooms (magenta color). When they finished and the seed balls formed, I clipped them off a few stems and they are blooming again.
