I grow L. parryi in SW Washington state, in a very cool microclimate. I give them full sun, and a raised bed of sandy loam soil. Last summer they grew within two feet of my tomatoes, and got the exact same fertilizer and water. http://i232.photobucket.com/albums/ee69/… As with all species lilies, I keep the soil shaded with companion plants and Doug fir bark. In winter, they get at least four months of soil temps in the 35-40F range. They live at high elevations with snow cover in nature. But I don't know how much winter chilling they need.