When should I plant Hướng dương in Zone 1a?

Start Hướng dương seeds indoors around 4 Th5. Transplant outdoors after 1 Th6. Expect first harvest around 5 Th8.

What is the last frost date for Zone 1a?

The average last spring frost date for Zone 1a is 25 Th5. The first fall frost averages 28 Th8, giving a 95-day growing season.

Can I grow Hướng dương in Zone 1a?

Yes. Hướng dương needs 90 days to harvest. Zone 1a has a 95-day growing season, which is sufficient.

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🌻 Growing Hướng dương in Zone 1a

Zone 1a has harsh winters and a short growing season. Start Hướng dương early indoors to maximize your harvest window. Sương giá cuối: 25 Th5. Sương giá đầu: 28 Th8.

Planting Calendar

Indoor

Outdoor

Harvest

4 Th528 Th8

Season: 25 Th5 – 28 Th8 (95 ngày)

Vùng1a

Sương giá cuối25 Th5

Sương giá đầu28 Th8

Mùa vụ95 ngày

Thu hoạch90 ngày

Ánh sángNắng hoàn toàn

When to Plant Hướng dương in Zone 1a

Start Seeds Indoors: 4 Th5

Start Hướng dương seeds indoors around 4 Th5 (3 tuần trước sương giá cuối). Optimal germination temperature: 75F. Germinates in 7-14 days.

Transplant Outdoors: 1 Th6

Transplant Hướng dương seedlings outdoors after 1 Th6. Wait until soil temperature reaches 55F. Space plants at 1/m² (30cm khoảng cách). Harden off plants for a week before moving outside.

Harvest: 5 Th8

First harvest approximately 5 Th8 (~65 ngày from transplant). Continue harvesting until first frost (28 Th8).

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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