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Can You Grow Rhubarb in California?
US · USDA Zone 9b · zones 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b, 9a, 9b, 10a, 10b
Rhubarb needs cold winters to break dormancy and struggles in warm climates.
Plant zones
California last frost
California first frost
Days to harvest
About Rhubarb
Rhubarb is extremely cold-hardy and productive — plant once and harvest stalks every spring for decades.
Plant crowns in spring. Never harvest the first year. Never eat the leaves — they are toxic. Mulch crowns in autumn. Divide every 5-7 years. Rhubarb actually improves after cold winters.
Gardening in California
California spans more climate zones than any other state. Coastal regions are mild year-round; the Central Valley is hot and productive; mountains are cold; deserts are extreme.
Frequently asked questions
Can you grow Rhubarb in California?
Rhubarb needs cold winters to break dormancy and struggles in warm climates.
What zone is California?
California spans USDA Zone 9b (5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b, 9a, 9b, 10a, 10b).
When do you plant Rhubarb in California?
See the planting guide for Rhubarb — timing depends on your exact frost date.