Annie's Annuals is an incredible nursery in Richmond, California. They have the largest selection of rare and unusual annuals and perennials anywhere. Some rarities they carry include a double-flowered nasturtium, a large, blue-flowered form of scarlet pimpernel, and a freakishly amazing South African spider iris.
Although Annie's is a veritable gardener's heaven, you need to drive through some rough neighborhoods to get there. That didn't prevent me, however, from stopping by and loading up on California native wildflowers such as baby blue eyes, tidy tips, bird's eyes, and 'Apricot Chiffon' California poppies.
Annie's Annuals is definitely worth a visit if you live in the Bay Area or are ever passing through.