Native to Mexico and warmer southern regions in the U.S., cosmos are self-seeding, deer-resistant annuals. They tolerate dry conditions and can grow to a height of six feet. The flowers vary widely, available in just about any color you can think of. Shorter varieties are perennials in warmer areas, including those with chocolate-brown blooms, a butterfly favorite. Horticulturists warn that while deer may avoid these plants in some areas, that doesn’t mean they are deer-resistant in all areas. In Oklahoma, deer seldom damage the plant, but in Georgia, gardeners may need to protect young buds, for example.

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