Arnold's mention of Mathew's mention of an eight-inch planting depth for Crocus sativus prompts a comment. Many years ago, someone published a note in (I think) one of the quarterly bulletins of the North American Rock Garden Society about the cultivation of some autumn-blooming crocus in Cornell, New York. This note was of particular interest to me at the time because I was then uncertain about just how hardy Crocus sativus was. The author of that note mentioned some old Crocus sativus plantings which were thriving in Cornell, and I think he attributed their survival to the fact that the corms were very deep. As I recall, Crocus ochroleucus was mentioned in the same article. Does anyone remember this note? Jim McKenney Montgomery County, Maryland, USA, USDA zone 7, where low blood sugar and consequent bad spelling and murky grammar are kicking in, and I need to take a breakfast break.