When should I plant Hướng dương in Zone 3b?

Start Hướng dương seeds indoors around 24 Th4. Transplant outdoors after 22 Th5. Expect first harvest around 26 Th7.

What is the last frost date for Zone 3b?

The average last spring frost date for Zone 3b is 15 Th5. The first fall frost averages 22 Th9, giving a 130-day growing season.

Can I grow Hướng dương in Zone 3b?

Yes. Hướng dương needs 90 days to harvest. Zone 3b has a 130-day growing season, which is sufficient. You can plant up to 2 successions.

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🌻 Growing Hướng dương in Zone 3b

Zone 3b has harsh winters and a short growing season. Start Hướng dương early indoors to maximize your harvest window. Sương giá cuối: 15 Th5. Sương giá đầu: 22 Th9.

Planting Calendar

Indoor

Outdoor

Harvest

24 Th422 Th9

Season: 15 Th5 – 22 Th9 (130 ngày) · Succession: plant every 2 weeks (up to 2x)

Vùng3b

Sương giá cuối15 Th5

Sương giá đầu22 Th9

Mùa vụ130 ngày

Thu hoạch90 ngày

Ánh sángNắng hoàn toàn

When to Plant Hướng dương in Zone 3b

Start Seeds Indoors: 24 Th4

Start Hướng dương seeds indoors around 24 Th4 (3 tuần trước sương giá cuối). Optimal germination temperature: 75F. Germinates in 7-14 days.

Transplant Outdoors: 22 Th5

Transplant Hướng dương seedlings outdoors after 22 Th5. Wait until soil temperature reaches 55F. Space plants at 1/m² (30cm khoảng cách). Harden off plants for a week before moving outside.

Harvest: 26 Th7

First harvest approximately 26 Th7 (~65 ngày from transplant). Continue harvesting until first frost (22 Th9).

Cây trồng đồng hành

✅ Dưa chuột✅ Bí ✅ Ngô✅ Đậu

❌ Khoai tây

Hướng dương in Other Zones

1a 1b 2a 2b 3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b 10a 10b 11a 11b 12a 12b 13a 13b

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