Ask-a-Dave's-Gardener: Sad Polemonium boreale, 1 by MrsAtoZ

MrsAtoZ wrote:
I'm new to gardening and just planted a bunch of things in late June. Everything seems to be flourishing (or at the very least, not dying) with the exception of these 2 Polemonium boreale (Jacob's ladder). They were slightly taller when I got them, but I cut them down after the first bloom to try to encourage another flowering. Basically they haven't grown at all. I expected the foliage to get more full but it hasn't. They get sun off and on during the day and I water daily. I don't know if they're getting too much/little sun or too much/little water! Thanks for any advice!