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Growing Comfrey in Surabaya

🇮🇩 Zone 13 Planting Guide · Tropical savanna climate

USDA Zone 13 365 frost-free days 60-90 days to harvest

Quick Answer: Growing Comfrey in Surabaya

Yes, you can grow Comfrey in Surabaya, ID! Plant during Nov, Dec, Jan, Feb for best results. Surabaya is in USDA Zone 13 with a Tropical savanna climate, offering 365 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 Surabaya + Comfrey

Surabaya'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
Surabaya range 24°C to 34°C

Surabaya Climate Data

USDA Zone
13
Frost-Free
365days
Winter Low
24°C
Summer High
34°C
Rainfall
1500mm/yr
Climate
Aw
Tropical savanna

Comfrey Planting Calendar for Surabaya

Green months show the best time to plant Comfrey in Surabaya

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 Surabaya

Surabaya, ID is in USDA Hardiness Zone 13 with a Tropical savanna climate (Köppen Aw). With winter lows of 24°C and summer highs of 34°C, the growing season spans approximately 365 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 Surabaya, the best months to plant Comfrey are November, December, January, February. 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.

Surabaya receives 1500mm of annual rainfall, which provides good natural moisture for Comfrey. Supplement with additional watering during dry spells.

Other Plants That Grow in Surabaya

More plants you can grow alongside Comfrey in Surabaya

Keep Exploring

Frequently Asked Questions

Can I grow comfrey in Surabaya?

Yes! Comfrey can be successfully grown in Surabaya, ID. Surabaya is in USDA Hardiness Zone 13 with a Tropical savanna climate. The difficulty level for growing Comfrey here is rated "medium". The best months to plant are November, December, January, February.

When should I plant comfrey in Surabaya?

In Surabaya, the recommended planting months for Comfrey are November, December, January, February. Surabaya has 365 frost-free days per year, with winter lows of 24°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 Surabaya?

Comfrey typically takes 60-90 days from planting to harvest. In Surabaya's Tropical savanna climate with 365 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 Surabaya?

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

What month do I plant comfrey in Surabaya?

Plant Comfrey in Surabaya during November, December, January, February. These are the optimal months based on Surabaya's USDA Zone 13 climate, 365 frost-free days, and temperature range of 24°C to 34°C.

Is comfrey hard to grow in Surabaya?

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

What grows well with comfrey in Surabaya?

In Surabaya, 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 Surabaya's Zone 13 climate.

Does comfrey need full sun in Surabaya?

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