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🌿 Herb medium

Growing Comfrey in Reykjavik

🇮🇸 Zone 5 Planting Guide · Subpolar oceanic climate

USDA Zone 5 130 frost-free days 60-90 days to harvest

Quick Answer: Growing Comfrey in Reykjavik

Yes, you can grow Comfrey in Reykjavik, IS! Plant during Mar, Apr, May, Jul, Aug for best results. Reykjavik is in USDA Zone 5 with a Subpolar oceanic climate, offering 130 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

Good Match Reykjavik + Comfrey

Reykjavik's temperatures (-3°C to 13°C) are within the tolerable range for Comfrey (-15°C to 30°C), though not always in the optimal zone (12°C to 24°C). Plant during recommended months for best results.

Comfrey tolerates -15°C to 30°C
Optimal: 12°C - 24°C
Reykjavik range -3°C to 13°C

Reykjavik Climate Data

USDA Zone
5
Frost-Free
130days
Winter Low
-3°C
Summer High
13°C
Rainfall
799mm/yr
Climate
Cfc
Subpolar oceanic

Comfrey Planting Calendar for Reykjavik

Green months show the best time to plant Comfrey in Reykjavik

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 Reykjavik

Reykjavik, IS is in USDA Hardiness Zone 5 with a Subpolar oceanic climate (Köppen Cfc). With winter lows of -3°C and summer highs of 13°C, the growing season spans approximately 130 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 Reykjavik, the best months to plant Comfrey are March, April, May, July, August. 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 799mm of annual rainfall, Reykjavik provides moderate natural moisture. You'll likely need to supplement with regular watering, especially during the growing season.

Other Plants That Grow in Reykjavik

More plants you can grow alongside Comfrey in Reykjavik

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Frequently Asked Questions

Can I grow comfrey in Reykjavik?

Yes! Comfrey can be successfully grown in Reykjavik, IS. Reykjavik is in USDA Hardiness Zone 5 with a Subpolar oceanic climate. The difficulty level for growing Comfrey here is rated "medium". The best months to plant are March, April, May, July, August.

When should I plant comfrey in Reykjavik?

In Reykjavik, the recommended planting months for Comfrey are March, April, May, July, August. Reykjavik has 130 frost-free days per year, with winter lows of -3°C and summer highs of 13°C. Comfrey is frost tolerant, giving you more flexibility with planting dates.

How long does comfrey take to grow in Reykjavik?

Comfrey typically takes 60-90 days from planting to harvest. In Reykjavik's Subpolar oceanic climate with 130 frost-free days, you have enough time with good planning 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 Reykjavik?

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

What month do I plant comfrey in Reykjavik?

Plant Comfrey in Reykjavik during March, April, May, July, August. These are the optimal months based on Reykjavik's USDA Zone 5 climate, 130 frost-free days, and temperature range of -3°C to 13°C.

Is comfrey hard to grow in Reykjavik?

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

What grows well with comfrey in Reykjavik?

In Reykjavik, 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 Reykjavik's Zone 5 climate.

Does comfrey need full sun in Reykjavik?

Comfrey requires full sun to partial shade. Comfrey tolerates lower light. In Reykjavik, 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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