Lesser Celandine seems to thrive in wet/damp soil. I would not compost it or
use it as a green manure as you would just spread it even more widely.
It's making an appearance here with a vengeance but, at the risk of getting
my head kicked in, I think it's quite pretty in flower beds.
I do appreciate it will be more of a pest on a veg plot.

Oh Dear, I`m not the only one who loves it am I ?

kate