Perennials: birder17 picture (Coreopsis Rehab)
Subject: Coreopsis Rehab
I have several Coreopsis verticillata \'Zagreb\'. They are 3 or 4 years old. The centers have all died out and there are several sprigs outside the \"circle\". I\'m wondering:
1. Why has this happened? and
2. What should I do about it?
Also, I cut the Zagreb back in early July a little to get a second round of blooms. It just died out. Maybe that is what made the plant die in the middle.
3. What do you think?
I know you need to divide this plant, but it seems too soon to have to do this.
My Moonbeam hasn\'t done this and it\'s been around a little longer. It also seems to bloom for a longer period. My new shoots of the Zagreb is all over the place. It\'s not the \"mounding\" plant I thought I was buying.
4. What has been your experience with either of these two plants?