I've bought this bonsai Acer today for 10€, but i dont know wich kind of Acer this is! Should i trim the branches with no leaves? I would be grateful for any tip on this tree! Thank You!
It is some cultivar of Japanese maple, but it looks very weak. Here is what I would do:
The soil looks too wet, but the tree is too weak to do a full repot. So carefully slip pot the tree with soil intact into a larger pot with well-draining bonsai soil.
Do not trim the leaves or branches
Be very careful not to over water the tree, wait for the soil to almost dry out before watering again.