Amaryllis Gervase - 28/30cm Bulb |Ships from Easy to Grow TM Bulb Size - 28/30cm - Largest Size Commercially Available! Compare us to others! Height: 18-24" inches Grow indoors in a pot, bloom time in approx 8-10 weeks. Light: Full Sun to Bright Indirect Light Ships from Easy to Grow Bulbs, a California Licensed Nursery