Tony adds an interesting thought. I'm germinating about 17 species right now. I've been planning to grow them in open sandy ground and see which are hardy enough to overwinter on the B.C. (Canada) coast. Several should be. I see a few of the hybrids coming back locally year after year, as long as they're in well drained sites. I will select from these species and *possibly* breed them toward hardiness, flower/foliage quality/quantity, etc. Brent Hine U. of BC Botanical Garden Vancouver BC Zone 7a (last few years 8 - 9)