To cut back or not?
I have several plants that are still flowering that should really have been killed off by frosts by now.
Young Penstemons and Erysimum (Bowles Mauve) are still flowering and creating new buds. Normally they have died off and I cut them back in early spring so they form busy new plants - what I have now are fairly gangly as they are young plants started last year.
Should I just leave them alone or cut them back? I'm concerned they are using all their energy creating buds now?
All advice welcolme