I can't grow Rhodophiala bifida here in northwestern Oregon, either. The plants just dwindle away over several years, as so many plants from summer-damp, hot climates do. I agree with Mary Sue that cold nights are probably the culprit. A 35-degree F (about 24 degrees C) difference between daytime and nighttime temperatures in midsummer is common where I live. The drop is a function of low atmospheric humidity, proximity to the cold Pacific coastal waters, and elevation gradients. Amaryllis belladonna will grow here but not flower (it will flower in the city of Portland, where the heat island effect raises night temperatures), and Nerines are greenhouse subjects exclusively. However, I can grow Zephyranthes and Habranthus in pots and flower them pretty well in summer. So, southerners and easterners, enjoy your subtropical amaryllids, and we will enjoy our Mediterranean and Californian bulbs! Jane McGary Northwestern Oregon, USA