Thank you!
Those plants have been there for at least 12 years. Last year they hardly bloomed at all; this year was a banner year!
I've begun transplanting youngsters in other places as well....I really like these "no care" plants. The hardest thing about growing these is trying to pull out all of the grass that wants to grow in the middle of it....luckily I've learned not to be overly fussy about it. I tell myself, "just enjoy the blooms, having the rest perfectly tidy isn't really all that important".
Sometimes I even listen!