If you want to venture off the back roads in Massachusetts, here are a few favorite growers to find some special daylilies. Bob Seawright, located in Carlisle, MA is a well-known daylily grower. http://www.daylilies-hostas.com/ You can find an extensive collection of hostas and daylilies. It's a great, first stop and there is ice cream close by. Not too far down the road, check out another grower, Blanchette Gardens. http://www.blanchettegardens.com/ Leo has an extensive collection of unusual plants, astilbes being one of his specialties. He also has a number of daylilies to offer but check the online catalog for rare and unusual perennials. All plants are sold as container stock. Golden Skep Farm http://www.goldenskepfarm.com/ in Berlin, MA also offers a wide choice of daylilies and hostas. Pleasant Garden Daylilies in Bolton, MA. http://www.pgdlbolton.com/index_files/Page355.htm is another favorite. Although smaller in nature, you'll receive personalized attention from Sally Ann, an extremely knowledgeable and passionate grower.
Daylilies are an extremely resilient plant - a must for a New England garden. This is the time to research varieties for bloom, color, size, and form.
NOTE: All daylily growers listed above sell their plants primarily by bare root division with the exception of Blanchette Gardens.