I learned about Longfield Gardens by buying their bags of bulbs at Costco. Their quality is superb, with large size bulbs that always grow, so I eagerly watch each spring and autumn for the bags of bulbs to appear in the Costco store. I didn't realize that Longfield Gardens also sella bulbs on their own website until I read a mention a couple of weeks ago in one of the NGA forums. Today I received an email from Longfield Gardens that the clematis I wanted was back in stock, and when I went to the site, I discovered that they are taking 15% off early orders. I'm not sure the expiration date.