Growing Lemongrass in St. Louis
🇺🇸 Zone 4 Planting Guide · Humid subtropical climate
Quick Answer: Growing Lemongrass in St. Louis
Yes, you can grow Lemongrass in St. Louis, US! Plant during Apr, May, Jun, Jul for best results. St. Louis is in USDA Zone 4 with a Humid subtropical climate, offering 210 frost-free days per year. The difficulty level is medium, and Lemongrass takes 75-100 days to harvest. Lemongrass needs full sun and regular watering.
Climate Match Analysis
St. Louis's climate requires careful timing. Winter lows (-6°C) drop below Lemongrass's minimum (15°C), so avoid cold months. Follow the recommended planting months for success.
St. Louis Climate Data
Lemongrass Planting Calendar for St. Louis
Green months show the best time to plant Lemongrass in St. Louis
Lemongrass Growing Requirements
Sunlight
Full Sun
6+ hours direct sunlight
Water
Regular
Consistent moisture, 1-2 inches/week
Days to Harvest
75-100
From planting to first harvest
Difficulty
Some experience helpful
💡 Growing Tips for Lemongrass
Root store-bought stalks in water. Bring indoors before frost. Wait until soil warms to at least 22°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: Lemongrass is NOT frost tolerant — wait until after the last frost in St. Louis.
How to Grow Lemongrass in St. Louis
St. Louis, US is in USDA Hardiness Zone 4 with a Humid subtropical climate (Köppen Cfa). With winter lows of -6°C and summer highs of 32°C, the growing season spans approximately 210 frost-free days. Lemongrass grows well with some gardening knowledge in this climate.
Lemongrass thrives in temperatures between 22°C and 32°C, requiring full sun and regular watering. In St. Louis, the best months to plant Lemongrass are April, May, June, July. Lemongrass is not frost tolerant, so it's important to wait until after the last spring frost before transplanting outdoors. Expect to harvest in approximately 75-100 days after planting.
St. Louis receives 1016mm of annual rainfall, which provides good natural moisture for Lemongrass. Supplement with additional watering during dry spells.
Other Plants That Grow in St. Louis
More plants you can grow alongside Lemongrass in St. Louis
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Frequently Asked Questions
Can I grow lemongrass in St. Louis?
Yes! Lemongrass can be successfully grown in St. Louis, US. St. Louis is in USDA Hardiness Zone 4 with a Humid subtropical climate. The difficulty level for growing Lemongrass here is rated "medium". The best months to plant are April, May, June, July.
When should I plant lemongrass in St. Louis?
In St. Louis, the recommended planting months for Lemongrass are April, May, June, July. St. Louis has 210 frost-free days per year, with winter lows of -6°C and summer highs of 32°C. Since Lemongrass is not frost tolerant, make sure to plant after the last frost date.
How long does lemongrass take to grow in St. Louis?
Lemongrass typically takes 75-100 days from planting to harvest. In St. Louis's Humid subtropical climate with 210 frost-free days, you have plenty of time to grow Lemongrass to maturity. Root store-bought stalks in water. Bring indoors before frost. Wait until soil warms to at least 22°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 lemongrass indoors in St. Louis?
Lemongrass can potentially be grown indoors in St. Louis 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 Apr, May, Jun, Jul outdoor planting window. Use containers with good drainage and regular watering.
What month do I plant lemongrass in St. Louis?
Plant Lemongrass in St. Louis during April, May, June, July. These are the optimal months based on St. Louis's USDA Zone 4 climate, 210 frost-free days, and temperature range of -6°C to 32°C.
Is lemongrass hard to grow in St. Louis?
Lemongrass is rated "medium" to grow in St. Louis. Some gardening experience is helpful. Pay attention to watering schedules and planting timing. The climate match for Lemongrass in St. Louis is Moderate.
What grows well with lemongrass in St. Louis?
In St. Louis, you can grow many companion plants alongside Lemongrass. Good options from the same planting window include Tomato, Basil, Lettuce, Carrot and 2 more. These plants share similar planting months and thrive in St. Louis's Zone 4 climate.
Does lemongrass need full sun in St. Louis?
Lemongrass requires full sun. In St. Louis, provide at least 6 hours of direct sunlight daily. Most garden locations with southern exposure will work well.