Turn the Wheel and plan the garden. Next to each vibrantplant photo there are symbols that let you know the sun needs, the colors of the plant and whether it is a good cutting flower. On the back of the Annual Garden Wheel is further information on cutting and conditioning, container gardening and more. All 20 plants featured on The Annual Garden Wheel will thrive in USDA zones 4, 5, 6, 7 and 8. Weatherproof Garden Wheels are made of flexible plastic with UV-resistant colors. Edited by horticulturist Ruth Rogers Clausen. Made in the USA.