White Flower Farm (website)
I have been to White Flower Farm, not a farm but a family owned nursery, with some plants from outside the United States. This is the place to order your bulbs, seeds, and plants of all kinds. Even though it was August 14, 2010, we had a spring-like day, and fortunately, no tourists or shoppers around! It was too early to buy bulbs for fall, tho they had a few to sell. It's a great place to walk the trails and enjoy all the sights in front of you.
Check out their catalog. When I was into gardening, I ordered from them frequently, usually getting my catalog in January or February and had a few months to dream about gardening in winter.