Growing Rhubarb in Seattle
🇺🇸 Zone 7 Planting Guide · Warm-summer Mediterranean climate
Quick Answer: Growing Rhubarb in Seattle
Yes, you can grow Rhubarb in Seattle, US! Plant during Jan, Feb, Mar, Sep, Oct for best results. Seattle is in USDA Zone 7 with a Warm-summer Mediterranean climate, offering 250 frost-free days per year. The difficulty level is medium, and Rhubarb takes 365-730 days to harvest. Rhubarb needs full sun to partial shade and regular watering.
Climate Match Analysis
Seattle's temperatures (2°C to 24°C) are within the tolerable range for Rhubarb (-20°C to 25°C), though not always in the optimal zone (10°C to 20°C). Plant during recommended months for best results.
Seattle Climate Data
Rhubarb Planting Calendar for Seattle
Green months show the best time to plant Rhubarb in Seattle
Rhubarb Growing Requirements
Sunlight
Full Sun to Partial Shade
2-4 hours direct sunlight
Water
Regular
Consistent moisture, 1-2 inches/week
Days to Harvest
365-730
From planting to first harvest
Difficulty
Some experience helpful
💡 Growing Tips for Rhubarb
Don't harvest first year. Only eat stalks -- leaves are poisonous. Can be planted 2-3 weeks before the last expected frost, giving it a head start on the growing season. Aim for about 2.5 cm of water per week, adjusting for rainfall. Organic mulch around the base helps maintain even moisture.
Frost tolerance: Rhubarb is frost tolerant — you can plant earlier in spring.
How to Grow Rhubarb in Seattle
Seattle, US is in USDA Hardiness Zone 7 with a Warm-summer Mediterranean climate (Köppen Csb). With winter lows of 2°C and summer highs of 24°C, the growing season spans approximately 250 frost-free days. Rhubarb grows well with some gardening knowledge in this climate.
Rhubarb thrives in temperatures between 10°C and 20°C, requiring full sun to partial shade and regular watering. In Seattle, the best months to plant Rhubarb are January, February, March, September, October. Since Rhubarb can tolerate frost, you have flexibility to plant earlier in the season or extend into cooler months. Expect to harvest in approximately 365-730 days after planting.
With 953mm of annual rainfall, Seattle provides moderate natural moisture. You'll likely need to supplement with regular watering, especially during the growing season.
Other Plants That Grow in Seattle
More plants you can grow alongside Rhubarb in Seattle
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Frequently Asked Questions
Can I grow rhubarb in Seattle?
Yes! Rhubarb can be successfully grown in Seattle, US. Seattle is in USDA Hardiness Zone 7 with a Warm-summer Mediterranean climate. The difficulty level for growing Rhubarb here is rated "medium". The best months to plant are January, February, March, September, October.
When should I plant rhubarb in Seattle?
In Seattle, the recommended planting months for Rhubarb are January, February, March, September, October. Seattle has 250 frost-free days per year, with winter lows of 2°C and summer highs of 24°C. Rhubarb is frost tolerant, giving you more flexibility with planting dates.
How long does rhubarb take to grow in Seattle?
Rhubarb typically takes 365-730 days from planting to harvest. In Seattle's Warm-summer Mediterranean climate with 250 frost-free days, you have plenty of time to grow Rhubarb to maturity. Don't harvest first year. Only eat stalks -- leaves are poisonous. Can be planted 2-3 weeks before the last expected frost, giving it a head start on the growing season. Aim for about 2.5 cm of water per week, adjusting for rainfall. Organic mulch around the base helps maintain even moisture.
Can I grow rhubarb indoors in Seattle?
Rhubarb can potentially be grown indoors in Seattle with proper conditions. It requires full sun to partial shade (2-4 hours of indirect light). Indoor growing extends your season beyond the Jan, Feb, Mar, Sep, Oct outdoor planting window. Use containers with good drainage and regular watering.
What month do I plant rhubarb in Seattle?
Plant Rhubarb in Seattle during January, February, March, September, October. These are the optimal months based on Seattle's USDA Zone 7 climate, 250 frost-free days, and temperature range of 2°C to 24°C.
Is rhubarb hard to grow in Seattle?
Rhubarb is rated "medium" to grow in Seattle. Some gardening experience is helpful. Pay attention to watering schedules and planting timing. The climate match for Rhubarb in Seattle is Good.
What grows well with rhubarb in Seattle?
In Seattle, you can grow many companion plants alongside Rhubarb. Good options from the same planting window include Tomato, Basil, Lettuce, Carrot and 2 more. These plants share similar planting months and thrive in Seattle's Zone 7 climate.
Does rhubarb need full sun in Seattle?
Rhubarb requires full sun to partial shade. Rhubarb tolerates lower light. In Seattle, a spot with filtered or indirect light for 2-4 hours works well.