Adam. I would give E. tuolumnense a try. Many, many years ago (mid 1970's) I purchased a bulb from Park Seed and planted it in a shady part of my tiny back yard in Buffalo, NY. The plant did quite well, blooming every year and even increasing a little by division. It never set seed. Because it is near lake Erie, Buffalo is part of zone 6, but I can assure you the winters are long, cold, and windy -- and usually snowy. Frost heave can be a problem, too. Summers are fairly warm and moist, which didn't seem to bother the bulbs. I also ordered a bulb of E. hendersonii. It also grew reliably, but never increased. I moved away from Buffalo in the late 1970's, so I can't say how long the bulbs lasted. Eugene Zielinski Augusta, GA USA > [Original Message] > From: Adam Fikso > To: Pacific Bulb Society > Date: 4/12/2010 11:52:27 AM > Subject: Re: [pbs] Flower count - WAS: What makes erythroniums bloom? > > Re: Erythronium tuolumnense: What is the coldest temperature that anyone > has grown this at? Or- what is the highest elevation at which it grows.? > I know that Tuolumne Meadows at 8600 'has gotten to -14 ° F, and I assume > that it might be found there. Having read recent postings, I think I NEED > this to be in my garden in Illinois. >