Mullein for cover crops

I also have a small amount of the following:

Mullein (lots and lots of this still in the heads)
Black locust
Yarrow
Chives
Hostas
Brown eyed Susan
Some kind of super tall mint relative
Queen Anne's lace
Scarlet runner beans
And many veggie and herb seeds

Looking for:

soil building cover crops like clover, rye, oats, etc,
Cuttings
Sun flowers
Root cuttings
Anything!