Growing Comfrey in St. Louis
🇺🇸 Zone 4 Planting Guide · Humid subtropical climate
Quick Answer: Growing Comfrey in St. Louis
Yes, you can grow Comfrey 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 medium, and Comfrey takes 60-90 days to harvest. Comfrey needs full sun to partial shade and regular watering.
Climate Match Analysis
St. Louis's climate requires careful timing. Summer highs (32°C) exceed Comfrey's maximum (30°C), so plant early or provide shade. Follow the recommended planting months for success.
St. Louis Climate Data
Comfrey Planting Calendar for St. Louis
Green months show the best time to plant Comfrey in St. Louis
Comfrey Growing Requirements
Sunlight
Full Sun to Partial Shade
2-4 hours direct sunlight
Water
Regular
Consistent moisture, 1-2 inches/week
Days to Harvest
60-90
From planting to first harvest
Difficulty
Some experience helpful
💡 Growing Tips for Comfrey
Plant Bocking 14 variety (non-spreading). Chop and drop as mulch 4-5 times per season. 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: Comfrey is frost tolerant — you can plant earlier in spring.
How to Grow Comfrey 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. Comfrey grows well with some gardening knowledge in this climate.
Comfrey thrives in temperatures between 12°C and 24°C, requiring full sun to partial shade and regular watering. In St. Louis, the best months to plant Comfrey are February, March, April, August, September. Since Comfrey 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 Comfrey. Supplement with additional watering during dry spells.
Other Plants That Grow in St. Louis
More plants you can grow alongside Comfrey in St. Louis
Keep Exploring
Frequently Asked Questions
Can I grow comfrey in St. Louis?
Yes! Comfrey 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 Comfrey here is rated "medium". The best months to plant are February, March, April, August, September.
When should I plant comfrey in St. Louis?
In St. Louis, the recommended planting months for Comfrey 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. Comfrey is frost tolerant, giving you more flexibility with planting dates.
How long does comfrey take to grow in St. Louis?
Comfrey 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 Comfrey to maturity. Plant Bocking 14 variety (non-spreading). Chop and drop as mulch 4-5 times per season. 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 comfrey indoors in St. Louis?
Comfrey can potentially be grown indoors in St. Louis with proper conditions. It requires full sun to partial shade (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 comfrey in St. Louis?
Plant Comfrey 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 comfrey hard to grow in St. Louis?
Comfrey 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 Comfrey in St. Louis is Moderate.
What grows well with comfrey in St. Louis?
In St. Louis, you can grow many companion plants alongside Comfrey. 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 comfrey need full sun in St. Louis?
Comfrey requires full sun to partial shade. Comfrey tolerates lower light. In St. Louis, a spot with filtered or indirect light for 2-4 hours works well.