I've been working on developing a rock garden on a hot slope that is covered with limestone riprap and 1/4 inch limestone dust and I'm wondering if there are any bulbs that would put up with this tough environment. I have a variety of tough perennials including lambs ears, yarrow, blue fescue and lots of sedums that are doing well but I'd like to add some bulbs for spring color. It's very well drained and lean alkaline soil. Any suggestions for tough bulbs that would like such a dry situation?

Thanks,

Steve