where to store
moist (90-95% RH)
as close to 32°F (0°C) as possible without freezing.
Avoid washing before storage, as excess moisture is undesirable and can shorten its shelf life.
You will only want to do any washing before storage if your brassica is very limp. Shocking in ice-cold water and then drying as much excess moisture will revive most brassicas. If you went this route, I would opt for wrapping in a dry absorbent layer to absorb any excess water.
1 - 6 weeks depending on specific type