Some tree peonies waking up very early in 2013

This year some of my tree peonies, mainly the ones that sprouted last year are waking up very early, even earlier than they did last year so I hope they know what they are doing. I do have a few set to sprout this year which are coming up early however those are not nearly as developed as these.

These are mainly Chinese tree peony seedlings. 

Can tree peony seedlings grow more leaves in the summer?

One thing I have always wondered is if tree peony seedlings could gather up enough energy to produce even more leaves, or if what appears in the spring is everything that will appear for the year. Now that it has been nearly 4 months after the tree peony seedlings started to come up, some of them have started to grow more leaves. I think it depends on how good the soil is, the species, and perhaps if there is enough moisture.

Here are some of the ones putting on more leaves. The new summer leaves appear to be slightly larger than the ones appearing in the spring which means the plants have  already gathered some energy.