advice on transplanting perennials
Is it horrible to try and transplant perennials this time of year? One reason can't be helped because we're getting a retaining wall. The other reason is that some perennials just need to be moved (sedum, hens and chicks, creeping thyme) as they're getting overshadowed by taller plants...
I would love your advice on this and guesses on if the plants will make it or not.