I grew mine from Silverhill seed, which sprouted well. Once the one bulb that survived reached blooming size (it took longer than it should have due to my marginal care) it bloomed every year for about 5 years. Last spring I went to repot after it went dormant and there was nothing in the pot. I do have seeds saved from several years. It never made enough to send to Dell. I stored it in the container, a 20-ounce foam beverage cup (this is 3" across by 6" deep / 10cm across / 20cm deep.) The soil is a heavy mix of local granitic fine soil and builder's sand that is wet all winter. Most years, after it went dormant and dried completely, I put the container, along with 15 close friends, into a standard cardboard document box and put the box in a closet in a spare bedroom whose air conditioning duct I close for the summer. Guests never visit in the summer. That room is never over 90F / 32C. I didn't look at it nor water it again until the next fall. A few summers I forgot to bring it in; it summered outside exposed to blazing sun, regular daytime temperatures over 104 F / 40C for months, and occasional drenching in summer thunderstorms. This did not seem to bother it and it always bloomed. I don't know why it succumbed this spring. It had flowered and set seed. I can only guess mine spent a much warmer summer than those in northern California. Leo Martin Phoenix Arizona USA