Without plants, there would be no oxygen and nothing to prevent bunnies from discovering that humans taste delicious. Keep nature distracted with today’s Groupon: for $15, you get $30 worth of plants and garden accessories at Viaduct Gardens in Waterloo. Viaduct Gardens is open to bloom-buyers from March through July.

Under the local ownership of seed-sowing specialist Cindi Hansen, Viaduct Gardens stocks a leafy menagerie of hardy perennials, vivacious annuals, fruits, and Proven Winners products. Geraniums serve as the greenhouse's mascot flower now that it no longer grows orchids in the shape of San Diego chicken heads (4 1/2”, $3.89). Cindi can also recommend a four-pack of annual plants that easily quadruples the pizzazz of any plot ($1.99). Otherwise, defy gravity's cruel laws and restrictive condominium bylaws with hanging baskets ($16.99–$175.99), or cultivate a more cerebral crop with a shades-wearing Plant Head pot that transforms plant fronds into a magnificent mane of hair (prices vary). Viaduct Gardens' new plants and products add an Alice in Wonderland flourish to gardens with the tiered planter, whose canted pots juxtapose nicely with the deep pinks, creams, and burgundies of a Haight Ashbury hibiscus.