Hello Kathy: Thanks for your reply. The chilling hours are also the limit factor in Taiwan. I think that the storage and dormant environment of the bulbs during the selling and tranportng period affects a lot. 1-2 species tulipa do perenialize in some people's pot on the top floor of his house in the plain area in Taiwan, I have also tried to buy some species, but even not sprout. (I have cut some in half. the bulb is fresh and healthy.) I'm also wonder that where could let the most bulbs natulaized well in the same field freely. Maybe the place which have the climate which is closer to the diversity origin of each bulbs could be. Among the members, what is the most numbers of species of bulbs are grown in the same field ? Fierycloud, Taiwan