Growing Nasturtium in Charleston
🇺🇸 Zone 7 Planting Guide · Humid subtropical climate
Quick Answer: Growing Nasturtium in Charleston
Yes, you can grow Nasturtium in Charleston, US! Plant during Mar, Apr, May, Jun for best results. Charleston is in USDA Zone 7 with a Humid subtropical climate, offering 260 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
Charleston's climate requires careful timing. Winter lows (3°C) drop below Nasturtium's minimum (5°C), so avoid cold months. Summer highs (33°C) exceed Nasturtium's maximum (30°C), so plant early or provide shade. Follow the recommended planting months for success.
Charleston Climate Data
Nasturtium Planting Calendar for Charleston
Green months show the best time to plant Nasturtium in Charleston
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 Charleston.
How to Grow Nasturtium in Charleston
Charleston, US is in USDA Hardiness Zone 7 with a Humid subtropical climate (Köppen Cfa). With winter lows of 3°C and summer highs of 33°C, the growing season spans approximately 260 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 Charleston, 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.
Charleston receives 1270mm of annual rainfall, which provides good natural moisture for Nasturtium. Be careful not to overwater — the natural rainfall may be sufficient.
Other Plants That Grow in Charleston
More plants you can grow alongside Nasturtium in Charleston
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Frequently Asked Questions
Can I grow nasturtium in Charleston?
Yes! Nasturtium can be successfully grown in Charleston, US. Charleston is in USDA Hardiness Zone 7 with a Humid subtropical 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 Charleston?
In Charleston, the recommended planting months for Nasturtium are March, April, May, June. Charleston has 260 frost-free days per year, with winter lows of 3°C and summer highs of 33°C. Since Nasturtium is not frost tolerant, make sure to plant after the last frost date.
How long does nasturtium take to grow in Charleston?
Nasturtium typically takes 35-52 days from planting to harvest. In Charleston's Humid subtropical climate with 260 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 Charleston?
Nasturtium can potentially be grown indoors in Charleston 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 Charleston?
Plant Nasturtium in Charleston during March, April, May, June. These are the optimal months based on Charleston's USDA Zone 7 climate, 260 frost-free days, and temperature range of 3°C to 33°C.
Is nasturtium hard to grow in Charleston?
Nasturtium is rated "easy" to grow in Charleston. This is a great choice for beginners — it is forgiving and adapts well to this climate. The climate match for Nasturtium in Charleston is Moderate.
What grows well with nasturtium in Charleston?
In Charleston, 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 Charleston's Zone 7 climate.
Does nasturtium need full sun in Charleston?
Nasturtium requires full sun to partial shade. Nasturtium tolerates lower light. In Charleston, a spot with filtered or indirect light for 2-4 hours works well.