Make notes of what you need — then head over to the lovely Green Springs Gardens to take in the gardens and shop! Oh, a generous assortment of native plants, herbs, perennials, annuals. Plus, lots of garden variety vendors to hawk their wares. Used books sale and baked goodies. Hours 9 a.m. to 3 p.m.,703-642-5173, 4603 Green Spring Road, Alexandria, VA.