When should I plant Rhubarb in Zone 5b?

Start Rhubarb seeds indoors around 17 Th2. Transplant outdoors after 31 Th3. Expect first harvest around 31 Th3.

What is the last frost date for Zone 5b?

The average last spring frost date for Zone 5b is 28 Th4. The first fall frost averages 8 Th10, giving a 163-day growing season.

Can I grow Rhubarb in Zone 5b?

Yes. Rhubarb needs 90 days to harvest. Zone 5b has a 163-day growing season, which is sufficient.

Growing Rhubarb in Zone 5b

Zone 5b has cold winters and a moderate growing season. Timing is key for Rhubarb in this zone. Sương giá cuối: 28 Th4. Sương giá đầu: 8 Th10.

Planting Calendar

Indoor

Outdoor

Harvest

17 Th28 Th10

Season: 28 Th4 – 8 Th10 (163 ngày)

Vùng5b

Sương giá cuối28 Th4

Sương giá đầu8 Th10

Mùa vụ163 ngày

Thu hoạch90 ngày

Ánh sángNắng hoàn toàn

When to Plant Rhubarb in Zone 5b

Start Seeds Indoors: 17 Th2

Start Rhubarb seeds indoors around 17 Th2 (10 tuần trước sương giá cuối). Optimal germination temperature: 65F. Germinates in 7-21 days.

Transplant Outdoors: 31 Th3

Transplant Rhubarb seedlings outdoors after 31 Th3. Wait until soil temperature reaches 40F. Space plants at 1/m² (30cm khoảng cách). Harden off plants for a week before moving outside.

Harvest: 31 Th3

First harvest approximately 31 Th3 (~365 ngày from transplant). Continue harvesting until first frost (8 Th10). 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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