My name is Martin Stone and my student, Shelton Slack, and I are working on a research project growing _Zephyranthes grandiflora_. We are at Western Kentucky University in Bowling Green, about an hour north of Nashville, TN. We experience warm summers and cold winters and are located in USDA hardiness zone 6 which means in an average winter we will experience at least one low temperature between 0 deg F and negative 10 deg. F. We have divided my large, old, potted clump into smaller pots and are growing them in a greenhouse with temps no cooler than 65 deg. F. We want to observe their flowering and try to answer the old question about what induces flowering. They are growing well after having been potted since September. We would like to know: 1. Is there a period after transplanting during which flowering does not occur? How long do we wait? 2. Is flowering sensitive to the daylength? 3. and the big question: Does anyone have clues into the nature of the flowering? There is not much scientific literature out there and the two main sources are a little dated and conflict. On a personal note, I have grown a potfull for the last dozen years from a single corm. They are all clones of the original plant, which is a bonus in this study. They stay outside until winter, when I bring them into the greenhouse. But in the summer, I water my pot with the hose every day and I see sporadic flowering. After a rain, there is a burst of flowers a day or so afterwards. I believe the flower buds are pre-formed and staying dormant until something about a rain event triggers them to elongate and open. Is it temperature fluctuation associated with a rain event? Is is cool rain water? Is it a drop in barometric pressure (seems unlikely but who knows?). What do you think and what are your observations? Thanks in Advance and I look forward to your advice and thoughts. My Best, Martin -- Martin Stone, Ph.D. Assistant Professor, Leichhardt Professor of Horticulture Department of Agriculture Western Kentucky University 1906 College Heights Blvd. #41066 Bowling Green, KY 42101-1066 Office (270) 745-5963 Fax (270) 745-5972