Although marketed as an "annual," this hybrid Gomphrena appears to actually be a tender perennial. I've had a potted specimen for about 3 years now. Every winter, it gets thrown into a cold garage that gets near freezing but not below. In the cold garage, it goes dormant or semi-dormant. It only gets lightly watered to keep it dormant and free of root-rot. When warm weather returns in spring, it resumes growth from the crown/roots. It has large, fleshy, white roots which suggest its true perennial nature. True annuals don't generally invest in such substantial roots since they depend on returning the next year via seed and not via dormant roots.

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