When should I plant Rhubarb in Zone 3b?

Start Rhubarb seeds indoors around 6 Th3. Transplant outdoors after 17 Th4. Expect first harvest around 17 Th4.

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 Rhubarb in Zone 3b?

Yes. Rhubarb needs 90 days to harvest. Zone 3b has a 130-day growing season, which is sufficient.

Growing Rhubarb in Zone 3b

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

Planting Calendar

Indoor

Outdoor

Harvest

6 Th322 Th9

Season: 15 Th5 – 22 Th9 (130 ngày)

Vùng3b

Sương giá cuối15 Th5

Sương giá đầu22 Th9

Mùa vụ130 ngày

Thu hoạch90 ngày

Ánh sángNắng hoàn toàn

When to Plant Rhubarb in Zone 3b

Start Seeds Indoors: 6 Th3

Start Rhubarb seeds indoors around 6 Th3 (10 tuần trước sương giá cuối). Optimal germination temperature: 65F. Germinates in 7-21 days.

Transplant Outdoors: 17 Th4

Transplant Rhubarb seedlings outdoors after 17 Th4. Wait until soil temperature reaches 40F. Space plants at 1/m² (30cm khoảng cách). Harden off plants for a week before moving outside.

Harvest: 17 Th4

First harvest approximately 17 Th4 (~365 ngày from transplant). Continue harvesting until first frost (22 Th9). Rhubarb can overwinter in mild climates for continued harvest.

Rhubarb 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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