Growing Broccoli in Seattle
🇺🇸 Zone 7 Planting Guide · Warm-summer Mediterranean climate
Quick Answer: Growing Broccoli in Seattle
Yes, you can grow Broccoli 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 Broccoli takes 55-80 days to harvest. Broccoli needs full sun and regular watering.
Climate Match Analysis
Seattle's temperatures (2°C to 24°C) are within the tolerable range for Broccoli (-2°C to 24°C), though not always in the optimal zone (10°C to 20°C). Plant during recommended months for best results.
Seattle Climate Data
Broccoli Planting Calendar for Seattle
Green months show the best time to plant Broccoli in Seattle
Broccoli Growing Requirements
Sunlight
Full Sun
6+ hours direct sunlight
Water
Regular
Consistent moisture, 1-2 inches/week
Days to Harvest
55-80
From planting to first harvest
Difficulty
Some experience helpful
💡 Growing Tips for Broccoli
Plant for spring or fall harvest. Heat causes bolting. 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: Broccoli is frost tolerant — you can plant earlier in spring.
Companion Plants for Broccoli
Find out which plants grow best alongside Broccoli — and which to keep apart
How to Grow Broccoli 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. Broccoli grows well with some gardening knowledge in this climate.
Broccoli thrives in temperatures between 10°C and 20°C, requiring full sun and regular watering. In Seattle, the best months to plant Broccoli are January, February, March, September, October. Since Broccoli can tolerate frost, you have flexibility to plant earlier in the season or extend into cooler months. Expect to harvest in approximately 55-80 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 Broccoli in Seattle
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Frequently Asked Questions
Can I grow broccoli in Seattle?
Yes! Broccoli 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 Broccoli here is rated "medium". The best months to plant are January, February, March, September, October.
When should I plant broccoli in Seattle?
In Seattle, the recommended planting months for Broccoli 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. Broccoli is frost tolerant, giving you more flexibility with planting dates.
How long does broccoli take to grow in Seattle?
Broccoli typically takes 55-80 days from planting to harvest. In Seattle's Warm-summer Mediterranean climate with 250 frost-free days, you have plenty of time to grow Broccoli to maturity. Plant for spring or fall harvest. Heat causes bolting. 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 broccoli indoors in Seattle?
Broccoli can potentially be grown indoors in Seattle with proper conditions. It requires full sun (6+ hours of direct light — a south-facing window or grow lights recommended). 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 broccoli in Seattle?
Plant Broccoli 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 broccoli hard to grow in Seattle?
Broccoli is rated "medium" to grow in Seattle. Some gardening experience is helpful. Pay attention to watering schedules and planting timing. The climate match for Broccoli in Seattle is Good.
What grows well with broccoli in Seattle?
In Seattle, you can grow many companion plants alongside Broccoli. 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 broccoli need full sun in Seattle?
Broccoli requires full sun. In Seattle, provide at least 6 hours of direct sunlight daily. Most garden locations with southern exposure will work well.