We transplanted some Phlox (David), a week ago, they look great & are about 6 inches tall, should i pinch them back this early or wait until they are how?... tall?
I wish I could help. I would like to suggest posting this over in the Perennials forum. You probably won't get much attention in this "Mail Call" forum, which is used primarily for thanking someone for something they got in snail mail.
Good Luck and welcome to Dave's Garden!!!!!