update: 3 common/black Alder - repotting

Two of them started from young forestry purpose plants. The one in the rectangle pot was dug out some 3 or 4 years ago from a ground that needed to become parking lot.

potting mixture: vermiculite-zeolite-lava sand-cocopeat, and a thin akadama toplayer just for 'esthetics'.

A lot of ramification work ahead but it's ok with Alders if you do this whilst already in pot. They're still vigorous growers in pot, when you water and fertilise them good.