Growing Corn in Seattle
🇺🇸 Zone 7 Planting Guide · Warm-summer Mediterranean climate
Quick Answer: Growing Corn in Seattle
Yes, you can grow Corn in Seattle, US! Plant during Mar, Apr, May, Jun 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 hard, and Corn takes 60-100 days to harvest. Corn needs full sun and regular watering.
Climate Match Analysis
Seattle's climate requires careful timing. Winter lows (2°C) drop below Corn's minimum (10°C), so avoid cold months. Follow the recommended planting months for success.
Seattle Climate Data
Corn Planting Calendar for Seattle
Green months show the best time to plant Corn in Seattle
Corn Growing Requirements
Sunlight
Full Sun
6+ hours direct sunlight
Water
Regular
Consistent moisture, 1-2 inches/week
Days to Harvest
60-100
From planting to first harvest
Difficulty
For experienced growers
💡 Growing Tips for Corn
Minimum 4x4 block for pollination. Heavy feeder -- needs nitrogen-rich soil. Wait until soil warms to at least 18°C before transplanting outdoors — cold soil stunts growth and can invite root rot. Aim for about 2.5 cm of water per week, adjusting for rainfall. Organic mulch around the base helps maintain even moisture.
Frost tolerance: Corn is NOT frost tolerant — wait until after the last frost in Seattle.
Companion Plants for Corn
Find out which plants grow best alongside Corn — and which to keep apart
How to Grow Corn 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. Corn requires more experience to grow successfully in this climate.
Corn thrives in temperatures between 18°C and 30°C, requiring full sun and regular watering. In Seattle, the best months to plant Corn are March, April, May, June. Corn is not frost tolerant, so it's important to wait until after the last spring frost before transplanting outdoors. Expect to harvest in approximately 60-100 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 Corn in Seattle
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Frequently Asked Questions
Can I grow corn in Seattle?
Yes! Corn 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 Corn here is rated "hard". The best months to plant are March, April, May, June.
When should I plant corn in Seattle?
In Seattle, the recommended planting months for Corn are March, April, May, June. Seattle has 250 frost-free days per year, with winter lows of 2°C and summer highs of 24°C. Since Corn is not frost tolerant, make sure to plant after the last frost date.
How long does corn take to grow in Seattle?
Corn typically takes 60-100 days from planting to harvest. In Seattle's Warm-summer Mediterranean climate with 250 frost-free days, you have plenty of time to grow Corn to maturity. Minimum 4x4 block for pollination. Heavy feeder -- needs nitrogen-rich soil. Wait until soil warms to at least 18°C before transplanting outdoors — cold soil stunts growth and can invite root rot. 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 corn indoors in Seattle?
Corn 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 Mar, Apr, May, Jun outdoor planting window. Use containers with good drainage and regular watering.
What month do I plant corn in Seattle?
Plant Corn in Seattle during March, April, May, June. 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 corn hard to grow in Seattle?
Corn is rated "hard" to grow in Seattle. This is challenging in this climate. Experienced growers will have the best success with careful attention to temperature and moisture. The climate match for Corn in Seattle is Moderate.
What grows well with corn in Seattle?
In Seattle, you can grow many companion plants alongside Corn. 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 corn need full sun in Seattle?
Corn requires full sun. In Seattle, provide at least 6 hours of direct sunlight daily. Most garden locations with southern exposure will work well.