New England Aster
I'm sorry I couldn't find a daisy forum to post this under.
I have some tall purple asters that are in bloom now. I know they are probably supposed to be tall, but I also read somewhere to pinch the plants before July to reduce the height.
Can someone tell me what part of the plant I am supposed to pinch next year?
Should I transplant or divide them after they finish blooming in the fall, or wait till spring when they come out again?