Thank you, Oscar.
I moved two seedlings because they were growing literally from the centre of other bushes. These two are in a big pot, which I might bring inside, or I can also cover it with oak leaves. I'll decide when the time comes. There are also two little ones growing close to their mother plants. I am not planning to move these ones. I will keep an eye on them, water the area, and protect them in the fall
Could you tell if a seedling is one or two years old? I suspect that the one in the last photo has been growing for two years because it has a tiny woody stem. Especially today, its leaves look developed, not like the baby leaves of the first seedling. It is entirely possible that I didn't notice it because it was hidden behind the Holly, close to the wall. I found these instructions and pictures from Cricket Hills, and the little seedling looks more like two-year-old seedling
https://www.treepeony.com/page...
They say it takes four years or more to see the first blooms
How long did it take for your seedlings? Now, the most important thing is to make sure they survive