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Growing Quinoa in Seattle

🇺🇸 Zone 7 Planting Guide · Warm-summer Mediterranean climate

USDA Zone 7 250 frost-free days 90-120 days to harvest

Quick Answer: Growing Quinoa in Seattle

Yes, you can grow Quinoa 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 Quinoa takes 90-120 days to harvest. Quinoa needs full sun and low watering.

Climate Match Analysis

Good Match Seattle + Quinoa

Seattle's temperatures (2°C to 24°C) are within the tolerable range for Quinoa (-2°C to 30°C), though not always in the optimal zone (12°C to 22°C). Plant during recommended months for best results.

Quinoa tolerates -2°C to 30°C
Optimal: 12°C - 22°C
Seattle range 2°C to 24°C

Seattle Climate Data

USDA Zone
7
Frost-Free
250days
Winter Low
2°C
Summer High
24°C
Rainfall
953mm/yr
Climate
Csb
Warm-summer Mediterranean

Quinoa Planting Calendar for Seattle

Green months show the best time to plant Quinoa in Seattle

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Plant Quinoa Not recommended

Quinoa Growing Requirements

☀️

Sunlight

Full Sun

6+ hours direct sunlight

💧

Water

Low

Drought tolerant, water sparingly

📅

Days to Harvest

90-120

From planting to first harvest

📊

Difficulty

medium

Some experience helpful

💡 Growing Tips for Quinoa

Cool-season crop. Rinse seeds to remove bitter saponins. Can be planted 2-3 weeks before the last expected frost, giving it a head start on the growing season. Overwatering is the most common mistake. Let soil dry out between waterings and ensure drainage is excellent.

Frost tolerance: Quinoa is frost tolerant — you can plant earlier in spring.

How to Grow Quinoa 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. Quinoa grows well with some gardening knowledge in this climate.

Quinoa thrives in temperatures between 12°C and 22°C, requiring full sun and low watering. In Seattle, the best months to plant Quinoa are January, February, March, September, October. Since Quinoa can tolerate frost, you have flexibility to plant earlier in the season or extend into cooler months. Expect to harvest in approximately 90-120 days after planting.

With 953mm of annual rainfall, Seattle provides moderate natural moisture. This should be adequate for Quinoa's water needs.

Other Plants That Grow in Seattle

More plants you can grow alongside Quinoa in Seattle

Keep Exploring

Frequently Asked Questions

Can I grow quinoa in Seattle?

Yes! Quinoa 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 Quinoa here is rated "medium". The best months to plant are January, February, March, September, October.

When should I plant quinoa in Seattle?

In Seattle, the recommended planting months for Quinoa 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. Quinoa is frost tolerant, giving you more flexibility with planting dates.

How long does quinoa take to grow in Seattle?

Quinoa typically takes 90-120 days from planting to harvest. In Seattle's Warm-summer Mediterranean climate with 250 frost-free days, you have plenty of time to grow Quinoa to maturity. Cool-season crop. Rinse seeds to remove bitter saponins. Can be planted 2-3 weeks before the last expected frost, giving it a head start on the growing season. Overwatering is the most common mistake. Let soil dry out between waterings and ensure drainage is excellent.

Can I grow quinoa indoors in Seattle?

Quinoa 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 low watering.

What month do I plant quinoa in Seattle?

Plant Quinoa 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 quinoa hard to grow in Seattle?

Quinoa is rated "medium" to grow in Seattle. Some gardening experience is helpful. Pay attention to watering schedules and planting timing. The climate match for Quinoa in Seattle is Good.

What grows well with quinoa in Seattle?

In Seattle, you can grow many companion plants alongside Quinoa. 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 quinoa need full sun in Seattle?

Quinoa requires full sun. In Seattle, provide at least 6 hours of direct sunlight daily. Most garden locations with southern exposure will work well.

Last updated: March 2026 · Climate data from NOAA, FAO, USDA

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