Growing Swiss Chard in Seattle
🇺🇸 Zone 7 Planting Guide · Warm-summer Mediterranean climate
Quick Answer: Growing Swiss Chard in Seattle
Yes, you can grow Swiss Chard 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 easy, and Swiss Chard takes 50-60 days to harvest. Swiss Chard 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 Swiss Chard (-2°C to 30°C), though not always in the optimal zone (10°C to 24°C). Plant during recommended months for best results.
Seattle Climate Data
Swiss Chard Planting Calendar for Seattle
Green months show the best time to plant Swiss Chard in Seattle
Swiss Chard Growing Requirements
Sunlight
Full Sun to Partial Shade
2-4 hours direct sunlight
Water
Regular
Consistent moisture, 1-2 inches/week
Days to Harvest
50-60
From planting to first harvest
Difficulty
Great for beginners
💡 Growing Tips for Swiss Chard
Cut-and-come-again harvesting extends the season. More heat tolerant than spinach. 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: Swiss Chard is frost tolerant — you can plant earlier in spring.
How to Grow Swiss Chard 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. Swiss Chard is one of the easiest plants to grow in this climate.
Swiss Chard thrives in temperatures between 10°C and 24°C, requiring full sun to partial shade and regular watering. In Seattle, the best months to plant Swiss Chard are January, February, March, September, October. Since Swiss Chard can tolerate frost, you have flexibility to plant earlier in the season or extend into cooler months. Expect to harvest in approximately 50-60 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 Swiss Chard in Seattle
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Frequently Asked Questions
Can I grow swiss chard in Seattle?
Yes! Swiss Chard 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 Swiss Chard here is rated "easy". The best months to plant are January, February, March, September, October.
When should I plant swiss chard in Seattle?
In Seattle, the recommended planting months for Swiss Chard 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. Swiss Chard is frost tolerant, giving you more flexibility with planting dates.
How long does swiss chard take to grow in Seattle?
Swiss Chard typically takes 50-60 days from planting to harvest. In Seattle's Warm-summer Mediterranean climate with 250 frost-free days, you have plenty of time to grow Swiss Chard to maturity. Cut-and-come-again harvesting extends the season. More heat tolerant than spinach. 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 swiss chard indoors in Seattle?
Swiss Chard 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 swiss chard in Seattle?
Plant Swiss Chard 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 swiss chard hard to grow in Seattle?
Swiss Chard is rated "easy" to grow in Seattle. This is a great choice for beginners — it is forgiving and adapts well to this climate. The climate match for Swiss Chard in Seattle is Good.
What grows well with swiss chard in Seattle?
In Seattle, you can grow many companion plants alongside Swiss Chard. 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 swiss chard need full sun in Seattle?
Swiss Chard requires full sun to partial shade. Swiss Chard tolerates lower light. In Seattle, a spot with filtered or indirect light for 2-4 hours works well.