I am showing these not to brag but just to let you see what my semps with just morning sun and a little bit of bat guano in part of the soil mix can do to these semps. I don't plant to use this mix anymore as I don't want semps so big that they won't fit within the grating cover that I put there to protect from critters.
Here's Grammens, a little etiolated and strappy measuring at 9 in. wide and 3 and half in. tall
Here's Unicorn at 9 and half wide and 4 in. tall; look at the size of those stolons with offsets on the end.
Here's one of those "Grandma's semp" tectorum at 6in wide and 4in tall
All are starting to grow beyond the grating when I bring it down over the plants. I think I will just take the offsets I see coming out and plant them in renovated bed when I re-line the bed with hardware cloth on 5 sides and place a leaner soil mix in per Lynn. That way no moles in the bed and smaller semps?