Tulipa sprengeri sends it's bulbs down very deep, (in Britain). It is late up and the last tulip to flower. Allowed to go to it's natural depth I don't see why it would need to be waterd even in dry summer areas. Perhaps you could try growing it in a cooler position instead.. I gave up growing it in a pot. Do you water the later flowering Calochortus with deep bulbs? I have found them awkward in pots too.... Peter (UK) On Wed, May 9, 2012 at 10:00 PM, Mary Sue Ittner <msittner@mcn.org> wrote: > They get watered when we > start getting rain in late fall. But they are slow to come up. This > year they came up in April. Like Angelo, by then the rain has slowed > down usually and the temperatures are getting warmer so you'd have to > start watering. >