http://www.uri.edu/ce/factsheets/sheets ... erant.html I hope this will help you select plants which can withstand periods of drought. I didn't realise there were quite so many!!!
Great resource - thanks! I'm always looking around for plants that can handle both drought and flood, seems they get so dry in the summer but soooo muddy in the winter here. If they don't float away and don't fry, they are a wonderful addition.
@eileen, The link no longer works. 24 Best drought tolerant plants that grow in lack of water Try: http://www.balconygardenweb.com/24-best-drought-tolerant-plants