No need to do any cutting back of foliage, just let them die back to allow the nutrients, to go back into the bulbs, to be stored for next years blooms.
If you can provide an area of dappled shade for them, this should simulate the woodland habitat that they naturally grow in, in the early spring.
I have a few drifts of them in my garden, which I dig up some of the tighter clumps, round about this time of year, divide them up and re-plant them to increase the swathes that I already have.
adding some compost or leaf mould at planting time, should also benefit them.