It would probably be worth potting them up in a fairly gritty/humusy mix in a pot to get them going. I don't think I'd soak them, though I would use a damp mix - then not water until they sprout through. Like Lachenalias, if that helps.

They do well in river shingle with silt - and well-drained conditions where there is reasonable humus in the soil. Sun or part-shade (sun ensures more flowers).

If you leave them to form a clump they develop a string of old corms below the one that's flowering - and spike-ended runners which also produce new plants. In a more demanding zone they will probably mind their manners.

I'd plant out into an area which is well-drained yet holds moisture over summer and I'd do so when the plants are around three inches high. They seem to do much better in the ground than in pots - but perhaps that's just me.