$30 Gift certificate for Harlequin's Gardens, Boulder County's best nursery.  From tomato plants to fruit trees, from wildflowers to tough fragrant roses, they specialize in plants that have been carefully selected to thrive here.  They grow many of the plants themselves, and offer local wildflowers and the best selection of own-root roses in the Front Range.  They also have great tools, gardening books, fertilizers and seeds.