In the last post, all the peonies were just waking up, but it has been 4 weeks since then, and they are almost fully grown for the year. Peonies tend to make almost all their growth before June which is when they typically flower.
Here are a few Japanese tree peonies which are noticeably larger and healthier than they were last year so most of them shouldn't be relying on their herbacous nurse roots anymore.
Some of them have flower buds already on their 2nd year as grafted plants.