Skip to content
🌿 Herb medium

Growing Comfrey in Fresno

🇺🇸 Zone 7 Planting Guide · Hot-summer Mediterranean climate

USDA Zone 7 280 frost-free days 60-90 days to harvest

Quick Answer: Growing Comfrey in Fresno

Yes, you can grow Comfrey in Fresno, US! Plant during Oct, Nov for best results. Fresno is in USDA Zone 7 with a Hot-summer Mediterranean climate, offering 280 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 Fresno + Comfrey

Fresno's climate requires careful timing. Summer highs (37°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
Fresno range 3°C to 37°C

Fresno Climate Data

USDA Zone
7
Frost-Free
280days
Winter Low
3°C
Summer High
37°C
Rainfall
292mm/yr
Climate
Csa
Hot-summer Mediterranean

Comfrey Planting Calendar for Fresno

Green months show the best time to plant Comfrey in Fresno

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 Fresno

Fresno, US is in USDA Hardiness Zone 7 with a Hot-summer Mediterranean climate (Köppen Csa). With winter lows of 3°C and summer highs of 37°C, the growing season spans approximately 280 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 Fresno, the best months to plant Comfrey are October, November. 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.

Fresno receives only 292mm of annual rainfall, so consistent irrigation will be essential for growing Comfrey successfully.

Other Plants That Grow in Fresno

More plants you can grow alongside Comfrey in Fresno

Keep Exploring

Frequently Asked Questions

Can I grow comfrey in Fresno?

Yes! Comfrey can be successfully grown in Fresno, US. Fresno is in USDA Hardiness Zone 7 with a Hot-summer Mediterranean climate. The difficulty level for growing Comfrey here is rated "medium". The best months to plant are October, November.

When should I plant comfrey in Fresno?

In Fresno, the recommended planting months for Comfrey are October, November. Fresno has 280 frost-free days per year, with winter lows of 3°C and summer highs of 37°C. Comfrey is frost tolerant, giving you more flexibility with planting dates.

How long does comfrey take to grow in Fresno?

Comfrey typically takes 60-90 days from planting to harvest. In Fresno's Hot-summer Mediterranean climate with 280 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 Fresno?

Comfrey can potentially be grown indoors in Fresno with proper conditions. It requires full sun to partial shade (2-4 hours of indirect light). Indoor growing extends your season beyond the Oct, Nov outdoor planting window. Use containers with good drainage and regular watering.

What month do I plant comfrey in Fresno?

Plant Comfrey in Fresno during October, November. These are the optimal months based on Fresno's USDA Zone 7 climate, 280 frost-free days, and temperature range of 3°C to 37°C.

Is comfrey hard to grow in Fresno?

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

What grows well with comfrey in Fresno?

In Fresno, 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 Fresno's Zone 7 climate.

Does comfrey need full sun in Fresno?

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

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

See an error? Report it