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Growing Comfrey in Oklahoma City

🇺🇸 Zone 5 Planting Guide · Humid subtropical climate

USDA Zone 5 215 frost-free days 60-90 days to harvest

Quick Answer: Growing Comfrey in Oklahoma City

Yes, you can grow Comfrey in Oklahoma City, US! Plant during Feb, Mar, Apr, Aug, Sep for best results. Oklahoma City is in USDA Zone 5 with a Humid subtropical climate, offering 215 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

Moderate Match Oklahoma City + Comfrey

Oklahoma City's climate requires careful timing. Summer highs (34°C) exceed Comfrey's maximum (30°C), so plant early or provide shade. Follow the recommended planting months for success.

Comfrey tolerates -15°C to 30°C
Optimal: 12°C - 24°C
Oklahoma City range -4°C to 34°C

Oklahoma City Climate Data

USDA Zone
5
Frost-Free
215days
Winter Low
-4°C
Summer High
34°C
Rainfall
930mm/yr
Climate
Cfa
Humid subtropical

Comfrey Planting Calendar for Oklahoma City

Green months show the best time to plant Comfrey in Oklahoma City

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Plant Comfrey Not recommended

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

medium

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 Oklahoma City

Oklahoma City, US is in USDA Hardiness Zone 5 with a Humid subtropical climate (Köppen Cfa). With winter lows of -4°C and summer highs of 34°C, the growing season spans approximately 215 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 Oklahoma City, 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.

With 930mm of annual rainfall, Oklahoma City provides moderate natural moisture. You'll likely need to supplement with regular watering, especially during the growing season.

Other Plants That Grow in Oklahoma City

More plants you can grow alongside Comfrey in Oklahoma City

Keep Exploring

Frequently Asked Questions

Can I grow comfrey in Oklahoma City?

Yes! Comfrey can be successfully grown in Oklahoma City, US. Oklahoma City is in USDA Hardiness Zone 5 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 Oklahoma City?

In Oklahoma City, the recommended planting months for Comfrey are February, March, April, August, September. Oklahoma City has 215 frost-free days per year, with winter lows of -4°C and summer highs of 34°C. Comfrey is frost tolerant, giving you more flexibility with planting dates.

How long does comfrey take to grow in Oklahoma City?

Comfrey typically takes 60-90 days from planting to harvest. In Oklahoma City's Humid subtropical climate with 215 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 Oklahoma City?

Comfrey can potentially be grown indoors in Oklahoma City 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 Oklahoma City?

Plant Comfrey in Oklahoma City during February, March, April, August, September. These are the optimal months based on Oklahoma City's USDA Zone 5 climate, 215 frost-free days, and temperature range of -4°C to 34°C.

Is comfrey hard to grow in Oklahoma City?

Comfrey is rated "medium" to grow in Oklahoma City. Some gardening experience is helpful. Pay attention to watering schedules and planting timing. The climate match for Comfrey in Oklahoma City is Moderate.

What grows well with comfrey in Oklahoma City?

In Oklahoma City, 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 Oklahoma City's Zone 5 climate.

Does comfrey need full sun in Oklahoma City?

Comfrey requires full sun to partial shade. Comfrey tolerates lower light. In Oklahoma City, a spot with filtered or indirect light for 2-4 hours works well.

Last updated: March 2026 · Climate data from NOAA, FAO, USDA

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