I have 3 identical perennials which are some type of salvia. 2 are growing fantastic but one has barely got going yet. I noticed the ground is hard 12 inches all round which look like roots. I think it needs digging up and replanting. Is it too late ?
The shrubby ones don't always take kindly to moving whereas the others are okay (for me). If it's not happy, l'd bite the bullet and shift it.