I can't help you with all of your list but I hope the three I can is useful
to you. Chinese elms germinate easily, in fact were I live they grow like
weeds. Sow fresh viable seed in spring on a 'cold bed' with a typical seed
raising media, apply directly on the surface an gently firm down.. I find
they germinate best in shady pos.. Black Birch ( do you mean Betula nigra
or River Birch) Again sow as above. Black Alder (Alnus glutinosa?) Sow
fresh, viable seed in the spring on a cold bed in a typical seed raising
media. Germination should be 6-8 weeks.