1) Japanese maple, 23 cm
2) gaarden lilac, Syringa vulgaris, 18 cm !!!
3) wild cherry, Prunus mahaleb
4) same, with planned front
5) Turkish oak, Quercus cerris, this tree lost lots of branches in the last years, I have to rebuild the crown now
6) European larch, Larix decidua, 20 cm