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Can You Grow Rhubarb in Colorado?
US · USDA Zone 5b · zones 3a, 3b, 4a, 4b, 5a, 5b, 6a, 6b
Rhubarb thrives here — it is extremely cold-hardy and needs cold winters to perform well.
Plant zones
Colorado last frost
Colorado 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 Colorado
Colorado has a semi-arid mountain climate with intense sunshine and low humidity. Front Range cities like Denver are Zone 5-6; higher elevations are Zones 3-4.
Frequently asked questions
Can you grow Rhubarb in Colorado?
Rhubarb thrives here — it is extremely cold-hardy and needs cold winters to perform well.
What zone is Colorado?
Colorado spans USDA Zone 5b (3a, 3b, 4a, 4b, 5a, 5b, 6a, 6b).
When do you plant Rhubarb in Colorado?
See the planting guide for Rhubarb — timing depends on your exact frost date.