Rhubarb (Rheum rhabarbarum) grows best in USDA Hardiness Zones 3-8. It thrives in cooler climates with winter temperatures that allow for dormancy. Here’s a breakdown of zones and corresponding states:

Recommended Growing Zones & States

Zone 3-4 (Cold Climates):

• Examples: Minnesota, North Dakota, Montana, Maine, Wisconsin
• Notes: Rhubarb thrives in these areas with long, cold winters.

Zone 5-6 (Moderate Climates):

• Examples: Iowa, Nebraska, Illinois, Pennsylvania, New York, Ohio
• Notes: Ideal for Rhubarb, but may need extra mulching in winter.

Zone 7-8 (Warmer Climates):

• Examples: North Carolina, Tennessee, Northern California, Oregon
• Notes: Rhubarb can be grown as an annual, but it may not thrive long-term due to the heat. Partial shade and regular watering help.

Can You Grow Rhubarb Indoors?

Yes, but it’s challenging because rhubarb needs a period of cold dormancy (below 40°F for several weeks). If growing indoors:

• Use a deep container (at least 12-18 inches deep).
• Provide cold stratification by placing the plant in a refrigerator or unheated garage in winter.
• Use strong grow lights if growing indoors year-round.

If you live in a warm climate (Zones 9+), growing Rhubarb indoors with controlled conditions may be a better option than outdoors. ❖