Growing Nasturtium in Seattle
🇺🇸 Zone 7 Planting Guide · Warm-summer Mediterranean climate
Quick Answer: Growing Nasturtium in Seattle
Yes, you can grow Nasturtium 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 easy, and Nasturtium takes 35-52 days to harvest. Nasturtium needs full sun to partial shade and low watering.
Climate Match Analysis
Seattle's climate requires careful timing. Winter lows (2°C) drop below Nasturtium's minimum (5°C), so avoid cold months. Follow the recommended planting months for success.
Seattle Climate Data
Nasturtium Planting Calendar for Seattle
Green months show the best time to plant Nasturtium in Seattle
Nasturtium Growing Requirements
Sunlight
Full Sun to Partial Shade
2-4 hours direct sunlight
Water
Low
Drought tolerant, water sparingly
Days to Harvest
35-52
From planting to first harvest
Difficulty
Great for beginners
💡 Growing Tips for Nasturtium
Poor soil produces more flowers. Seeds are large and easy for kids. Wait until soil warms to at least 15°C before transplanting outdoors — cold soil stunts growth and can invite root rot. Overwatering is the most common mistake. Let soil dry out between waterings and ensure drainage is excellent.
Frost tolerance: Nasturtium is NOT frost tolerant — wait until after the last frost in Seattle.
How to Grow Nasturtium 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. Nasturtium is one of the easiest plants to grow in this climate.
Nasturtium thrives in temperatures between 15°C and 25°C, requiring full sun to partial shade and low watering. In Seattle, the best months to plant Nasturtium are March, April, May, June. Nasturtium is not frost tolerant, so it's important to wait until after the last spring frost before transplanting outdoors. Expect to harvest in approximately 35-52 days after planting.
With 953mm of annual rainfall, Seattle provides moderate natural moisture. This should be adequate for Nasturtium's water needs.
Other Plants That Grow in Seattle
More plants you can grow alongside Nasturtium in Seattle
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Frequently Asked Questions
Can I grow nasturtium in Seattle?
Yes! Nasturtium 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 Nasturtium here is rated "easy". The best months to plant are March, April, May, June.
When should I plant nasturtium in Seattle?
In Seattle, the recommended planting months for Nasturtium 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 Nasturtium is not frost tolerant, make sure to plant after the last frost date.
How long does nasturtium take to grow in Seattle?
Nasturtium typically takes 35-52 days from planting to harvest. In Seattle's Warm-summer Mediterranean climate with 250 frost-free days, you have plenty of time to grow Nasturtium to maturity. Poor soil produces more flowers. Seeds are large and easy for kids. Wait until soil warms to at least 15°C before transplanting outdoors — cold soil stunts growth and can invite root rot. Overwatering is the most common mistake. Let soil dry out between waterings and ensure drainage is excellent.
Can I grow nasturtium indoors in Seattle?
Nasturtium 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 Mar, Apr, May, Jun outdoor planting window. Use containers with good drainage and low watering.
What month do I plant nasturtium in Seattle?
Plant Nasturtium 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 nasturtium hard to grow in Seattle?
Nasturtium 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 Nasturtium in Seattle is Moderate.
What grows well with nasturtium in Seattle?
In Seattle, you can grow many companion plants alongside Nasturtium. 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 nasturtium need full sun in Seattle?
Nasturtium requires full sun to partial shade. Nasturtium tolerates lower light. In Seattle, a spot with filtered or indirect light for 2-4 hours works well.