You can dig up and store the bulbs over winter.
Mine are planted in a huge pot. I cut them back to about an inch when they die back in the fall and store the pot in a heated (40° ish) garage. They will sprout when they are ready and you'll have babies in the pot which should bloom the along with the mother bulb. Mine get huge... 4'-5'
Found out this spring it is also available in a very pale yellow called Sulphur.
This is an early pic of mine first white blooms last year. It actually got 6' tall. No idea why.
I bought 3 bulbs from eflowergarden/touch of nature this spring. Sulfur Queen (a pale yellow). I have 2 pots of old bulbs that were my grandmother's...I'm hoping they bloom this year as they never have since I've had them.
I really didnt expect them to bloom but I love it! They are just about gone but they were gorgeous. Only 2 of mine bloomed also. The other one doesn't look like it will bloom but I think it has an increase...there are new leaves coming up beside it.
Chocolate, I don't know why they get so tall, but I seem mine reaching for the sun. They're related to amaryllis (Hippeastrum). I'm going to follow your lead and bring them in this winter. This year I planted all six in a large container.