Growing Mint in St. Louis
🇺🇸 Zone 4 Planting Guide · Humid subtropical climate
Quick Answer: Growing Mint in St. Louis
Yes, you can grow Mint in St. Louis, US! Plant during Feb, Mar, Apr, Aug, Sep 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 easy, and Mint takes 60-90 days to harvest. Mint needs partial shade ok and regular watering.
Climate Match Analysis
St. Louis's climate requires careful timing. Winter lows (-6°C) drop below Mint's minimum (-5°C), so avoid cold months. Summer highs (32°C) exceed Mint's maximum (30°C), so plant early or provide shade. Follow the recommended planting months for success.
St. Louis Climate Data
Mint Planting Calendar for St. Louis
Green months show the best time to plant Mint in St. Louis
Mint Growing Requirements
Sunlight
Partial Shade OK
2-4 hours direct sunlight
Water
Regular
Consistent moisture, 1-2 inches/week
Days to Harvest
60-90
From planting to first harvest
Difficulty
Great for beginners
💡 Growing Tips for Mint
Always grow in a pot -- it will take over your garden. Harvest often to control growth. Can be planted 2-3 weeks before the last expected frost, giving it a head start on the growing season. Aim for about 2.5 cm of water per week, adjusting for rainfall. Organic mulch around the base helps maintain even moisture.
Frost tolerance: Mint is frost tolerant — you can plant earlier in spring.
Companion Plants for Mint
Find out which plants grow best alongside Mint — and which to keep apart
Grow Mint Indoors
No garden? Learn how to grow Mint indoors with our complete guide
How to Grow Mint 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. Mint is one of the easiest plants to grow in this climate.
Mint thrives in temperatures between 12°C and 22°C, requiring partial shade ok and regular watering. In St. Louis, the best months to plant Mint are February, March, April, August, September. Since Mint can tolerate frost, you have flexibility to plant earlier in the season or extend into cooler months. Expect to harvest in approximately 60-90 days after planting.
St. Louis receives 1016mm of annual rainfall, which provides good natural moisture for Mint. Supplement with additional watering during dry spells.
Other Plants That Grow in St. Louis
More plants you can grow alongside Mint in St. Louis
Keep Exploring
Frequently Asked Questions
Can I grow mint in St. Louis?
Yes! Mint 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 Mint here is rated "easy". The best months to plant are February, March, April, August, September.
When should I plant mint in St. Louis?
In St. Louis, the recommended planting months for Mint are February, March, April, August, September. St. Louis has 210 frost-free days per year, with winter lows of -6°C and summer highs of 32°C. Mint is frost tolerant, giving you more flexibility with planting dates.
How long does mint take to grow in St. Louis?
Mint typically takes 60-90 days from planting to harvest. In St. Louis's Humid subtropical climate with 210 frost-free days, you have plenty of time to grow Mint to maturity. Always grow in a pot -- it will take over your garden. Harvest often to control growth. Can be planted 2-3 weeks before the last expected frost, giving it a head start on the growing season. 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 mint indoors in St. Louis?
Mint can potentially be grown indoors in St. Louis with proper conditions. It requires partial shade ok (2-4 hours of indirect light). Indoor growing extends your season beyond the Feb, Mar, Apr, Aug, Sep outdoor planting window. Use containers with good drainage and regular watering.
What month do I plant mint in St. Louis?
Plant Mint in St. Louis during February, March, April, August, September. 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 mint hard to grow in St. Louis?
Mint is rated "easy" to grow in St. Louis. This is a great choice for beginners — it is forgiving and adapts well to this climate. The climate match for Mint in St. Louis is Moderate.
What grows well with mint in St. Louis?
In St. Louis, you can grow many companion plants alongside Mint. 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 mint need full sun in St. Louis?
Mint requires partial shade ok. Mint tolerates lower light. In St. Louis, a spot with filtered or indirect light for 2-4 hours works well.