The itohs probably didn't like the freeze which is why they aren't blooming this year. Timing is everything with peonies. They should bloom next year, assuming you don't get hit with anything unexpected weather wise. If you are expecting a hard freeze like that after a warm spell, cover them with blankets to keep them warmer. It might help but otherwise it's just up to ma nature to decide. Add some compost this year to feed them a bit and cross fingers and toes that next year is a better year.
If you have more questions we do have a peony forum on here and it's very active so you can get more and possibly better answers there.
https://garden.org/forums/view...
