Diana is on to something for growing Erythroniums in southern California: Look for the southernmost species, and the southernmost garden propagated plants, and then plant them in the coldest area of your yard (noting Roger's comment on E. grandiflorum). There are some midwestern Erythroniums that grow fairly far south. I wonder if one of those might do well for you? E. mesochoreum lives from Texas to Iowa. E. rostratum from Texas to Ohio, and E. umbilicatum is in the southeast. E. albidum and E. americanum live along the east coast, but how far south doesn't come to mind right this minute. Kathleen