Northern Sea Oats struggling
Everyone else seems to have good luck with this, but the two I bought two years ago are struggling.
Found them in a forgotten corner of a nursery, both looked good but their roots were nearly bursting out of their pots. Took them home, pruned back the outer roots and planted in full sun with lots of water.
Last year, they grew only half as large as they had been in the pots, with only a few seedheads.
This year, they are sending up only a a few new shoots, just on the outer edge of the ring of old growth.
Do these need to be divided? Only reason I thought not was because they had grown so well when potbound.
Any help appreciated.