Two final cultural pointers: I have concluded that edgeworthias grow best in part sun to part shade in an east-facing location. However, several southern gardeners have written in that they grow it in full sun, and it thrives. No one has mentioned success in full shade. Also, my original...
I prune them the same way and they get the same amount of light, they are planted at the base of a north west facing wall. Now, the two bushes last year produced identical amounts of flowers, but this year on of the two produced very small flower heads, 4 times smaller than the ...