Name: Glen Ingram Macleay Is, Qld, Australia (Zone 12a) (Lee Reinke X Rose F Kennedy) X Unk
I get it over here in Australia too. The plants recover but can miss flowering. This season it was a MORROCAN SUMMER clump that did it. Until I learnt more after joining ATP, I used to dig them up, divide and move: all successfully.
The problem is that when you are young your life it is ruined by your parents. When you are older it is ruined by your children.