Hi Marilyn.
I've had that semp since 2010, so three years. But have harvested numerous offset from it over the last few years.
In that photo taken last year I would say the clump is approximately 9" x 9". I can go out tomorrow and measure the clump that's out there now if you like, with a photo of it.
It really is a great semp. It has wonderful color changes through the year.
