I grow this plant (from seed collected by Wayne Roderick a few years ago) in a sand bed in the garden here in eastern England. The bed has a roughly seven inch layer of sand with a layer of gritty compost below. The bulbs are planted in the sand, just above the compost level. They are doing better here than in a raised bed of standard free draining compost and better than the few I keep in a pot. It is in full flower now, dwarfing the commercial clone 'Queen Fabiola.' Tony Goode, Nowich UK. Mintemp -8C