When is it too late to plant perennial seedlings?
Hi, this is a newbie question so I apologize if it leaves you rolling your eyes...
I am planning to replace our ugly foundation boxwoods with a native perennial garden this spring. In an effort to save some money, I started a bunch of seeds a few months ago (gaillardia, agastache, eupatorium, Muhlenbergia, liatris, monarda, penstemon, echinacea, sedum, etc) thinking they would be just the right size to put in the ground come mid-April. Well, here we are, and I was wrong. The biggest are maybe an inch tall and the smallest have just started sprouting. The bed they are going in is south facing and gets full sun.
My question is, how late is too late to wait to put these babies in the ground? I don't want to do it too early for fear they won't make (and that they'll be so small I won't be able to tell them apart from any weeds that are sprouting) but I don't want to wait until it's too late and it's blazing hot and they fry in the sun. Should I wait until fall?