Carol Dee
Garden Master
I had 5 pinks going into the winter. Only 2 survived. I am going to blame the weather.
YEP, about the same age, and in a bed that tends towards getting too dry! I suspected the weather. They had spread on there own, maybe I will get a few more from this years seeds.They are highly susceptible to root rot and need to be in well drained soil, I have read. We had much more snow than usual, and it lasted forever. My plants were 3 or 4 years old and didn't come back.
You new ones should if you let them.You are lucky yours spread. Nothing here ever spreads. LOL.
If you dead head them to keep them flowering , leave a few to go to seed. Mine seemed to self seed o.k.Super! I gave them plenty of room to do so...