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🥬 Vegetable medium

Growing Radicchio in Sapporo

🇯🇵 Zone 3 Planting Guide · Warm-summer humid continental climate

USDA Zone 3 170 frost-free days 60-80 days to harvest

Quick Answer: Growing Radicchio in Sapporo

Yes, you can grow Radicchio in Sapporo, JP! Plant during Mar, Apr, May, Aug, Sep for best results. Sapporo is in USDA Zone 3 with a Warm-summer humid continental climate, offering 170 frost-free days per year. The difficulty level is medium, and Radicchio takes 60-80 days to harvest. Radicchio needs full sun to partial shade and regular watering.

Climate Match Analysis

Moderate Match Sapporo + Radicchio

Sapporo's climate requires careful timing. Winter lows (-8°C) drop below Radicchio's minimum (-5°C), so avoid cold months. Summer highs (26°C) exceed Radicchio's maximum (24°C), so plant early or provide shade. Follow the recommended planting months for success.

Radicchio tolerates -5°C to 24°C
Optimal: 10°C - 18°C
Sapporo range -8°C to 26°C

Sapporo Climate Data

USDA Zone
3
Frost-Free
170days
Winter Low
-8°C
Summer High
26°C
Rainfall
1107mm/yr
Climate
Dfb
Warm-summer humid continental

Radicchio Planting Calendar for Sapporo

Green months show the best time to plant Radicchio in Sapporo

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

Radicchio Growing Requirements

☀️

Sunlight

Full Sun to Partial Shade

2-4 hours direct sunlight

💧

Water

Regular

Consistent moisture, 1-2 inches/week

📅

Days to Harvest

60-80

From planting to first harvest

📊

Difficulty

medium

Some experience helpful

💡 Growing Tips for Radicchio

Fall-planted heads are best. Cold brings out red color. 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: Radicchio is frost tolerant — you can plant earlier in spring.

How to Grow Radicchio in Sapporo

Sapporo, JP is in USDA Hardiness Zone 3 with a Warm-summer humid continental climate (Köppen Dfb). With winter lows of -8°C and summer highs of 26°C, the growing season spans approximately 170 frost-free days. Radicchio grows well with some gardening knowledge in this climate.

Radicchio thrives in temperatures between 10°C and 18°C, requiring full sun to partial shade and regular watering. In Sapporo, the best months to plant Radicchio are March, April, May, August, September. Since Radicchio can tolerate frost, you have flexibility to plant earlier in the season or extend into cooler months. Expect to harvest in approximately 60-80 days after planting.

Sapporo receives 1107mm of annual rainfall, which provides good natural moisture for Radicchio. Supplement with additional watering during dry spells.

Other Plants That Grow in Sapporo

More plants you can grow alongside Radicchio in Sapporo

Keep Exploring

Frequently Asked Questions

Can I grow radicchio in Sapporo?

Yes! Radicchio can be successfully grown in Sapporo, JP. Sapporo is in USDA Hardiness Zone 3 with a Warm-summer humid continental climate. The difficulty level for growing Radicchio here is rated "medium". The best months to plant are March, April, May, August, September.

When should I plant radicchio in Sapporo?

In Sapporo, the recommended planting months for Radicchio are March, April, May, August, September. Sapporo has 170 frost-free days per year, with winter lows of -8°C and summer highs of 26°C. Radicchio is frost tolerant, giving you more flexibility with planting dates.

How long does radicchio take to grow in Sapporo?

Radicchio typically takes 60-80 days from planting to harvest. In Sapporo's Warm-summer humid continental climate with 170 frost-free days, you have enough time with good planning to grow Radicchio to maturity. Fall-planted heads are best. Cold brings out red color. 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 radicchio indoors in Sapporo?

Radicchio can potentially be grown indoors in Sapporo 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, Aug, Sep outdoor planting window. Use containers with good drainage and regular watering.

What month do I plant radicchio in Sapporo?

Plant Radicchio in Sapporo during March, April, May, August, September. These are the optimal months based on Sapporo's USDA Zone 3 climate, 170 frost-free days, and temperature range of -8°C to 26°C.

Is radicchio hard to grow in Sapporo?

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

What grows well with radicchio in Sapporo?

In Sapporo, you can grow many companion plants alongside Radicchio. Good options from the same planting window include Tomato, Basil, Lettuce, Carrot and 2 more. These plants share similar planting months and thrive in Sapporo's Zone 3 climate.

Does radicchio need full sun in Sapporo?

Radicchio requires full sun to partial shade. Radicchio tolerates lower light. In Sapporo, 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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