Growing Nasturtium in Boise
🇺🇸 Zone 4 Planting Guide · Cold semi-arid climate
Quick Answer: Growing Nasturtium in Boise
Yes, you can grow Nasturtium in Boise, US! Plant during May, Jun, Jul, Aug for best results. Boise is in USDA Zone 4 with a Cold semi-arid climate, offering 165 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
Boise's climate requires careful timing. Winter lows (-7°C) drop below Nasturtium's minimum (5°C), so avoid cold months. Summer highs (34°C) exceed Nasturtium's maximum (30°C), so plant early or provide shade. Follow the recommended planting months for success.
Boise Climate Data
Nasturtium Planting Calendar for Boise
Green months show the best time to plant Nasturtium in Boise
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 Boise.
How to Grow Nasturtium in Boise
Boise, US is in USDA Hardiness Zone 4 with a Cold semi-arid climate (Köppen BSk). With winter lows of -7°C and summer highs of 34°C, the growing season spans approximately 165 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 Boise, the best months to plant Nasturtium are May, June, July, August. 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.
Boise receives only 307mm of annual rainfall, so consistent irrigation will be essential for growing Nasturtium successfully.
Other Plants That Grow in Boise
More plants you can grow alongside Nasturtium in Boise
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Frequently Asked Questions
Can I grow nasturtium in Boise?
Yes! Nasturtium can be successfully grown in Boise, US. Boise is in USDA Hardiness Zone 4 with a Cold semi-arid climate. The difficulty level for growing Nasturtium here is rated "easy". The best months to plant are May, June, July, August.
When should I plant nasturtium in Boise?
In Boise, the recommended planting months for Nasturtium are May, June, July, August. Boise has 165 frost-free days per year, with winter lows of -7°C and summer highs of 34°C. Since Nasturtium is not frost tolerant, make sure to plant after the last frost date.
How long does nasturtium take to grow in Boise?
Nasturtium typically takes 35-52 days from planting to harvest. In Boise's Cold semi-arid climate with 165 frost-free days, you have enough time with good planning 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 Boise?
Nasturtium can potentially be grown indoors in Boise with proper conditions. It requires full sun to partial shade (2-4 hours of indirect light). Indoor growing extends your season beyond the May, Jun, Jul, Aug outdoor planting window. Use containers with good drainage and low watering.
What month do I plant nasturtium in Boise?
Plant Nasturtium in Boise during May, June, July, August. These are the optimal months based on Boise's USDA Zone 4 climate, 165 frost-free days, and temperature range of -7°C to 34°C.
Is nasturtium hard to grow in Boise?
Nasturtium is rated "easy" to grow in Boise. This is a great choice for beginners — it is forgiving and adapts well to this climate. The climate match for Nasturtium in Boise is Moderate.
What grows well with nasturtium in Boise?
In Boise, 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 Boise's Zone 4 climate.
Does nasturtium need full sun in Boise?
Nasturtium requires full sun to partial shade. Nasturtium tolerates lower light. In Boise, a spot with filtered or indirect light for 2-4 hours works well.