Stringy stonecrop, Sedum sarmentosum, is probably the fastest-growing sedum around -- at least in the cold-hardy species.
It's quickly taken over the entire stream area, covering the other sedum varieties, and leaving a blanket of yellow that is actually quite nice.
I'll be ripping most of this out after blooming though, as it's just too vigorous. I haven't measured how far it will travel in a year, but it must be a couple of feet in each direction.
|Sedum sarmentosum, stringy stonecrop|
The fate of the plants along the stream edge is one of the reasons I've put the rebuild project off so long, but this is not one plant I'm going to worry about.
Does anybody grow this in a way that keeps it from taking over? I'd love to hear ideas.