When should I plant Rhubarb in Zone 9b?

Start Rhubarb seeds indoors around 30 Th12. Transplant outdoors after 10 Th2. Expect first harvest around 10 Th2.

What is the last frost date for Zone 9b?

The average last spring frost date for Zone 9b is 10 Th3. The first fall frost averages 15 Th11, giving a 250-day growing season.

Can I grow Rhubarb in Zone 9b?

Yes. Rhubarb needs 90 days to harvest. Zone 9b has a 250-day growing season, which is sufficient.

Growing Rhubarb in Zone 9b

Zone 9b has warm winters and an extended growing season -- excellent for heat-loving crops like Rhubarb. Sương giá cuối: 10 Th3. Sương giá đầu: 15 Th11.

Planting Calendar

Indoor

Outdoor

Harvest

30 Th1215 Th11

Season: 10 Th3 – 15 Th11 (250 ngày)

Vùng9b

Sương giá cuối10 Th3

Sương giá đầu15 Th11

Mùa vụ250 ngày

Thu hoạch90 ngày

Ánh sángNắng hoàn toàn

When to Plant Rhubarb in Zone 9b

Start Seeds Indoors: 30 Th12

Start Rhubarb seeds indoors around 30 Th12 (10 tuần trước sương giá cuối). Optimal germination temperature: 65F. Germinates in 7-21 days.

Transplant Outdoors: 10 Th2

Transplant Rhubarb seedlings outdoors after 10 Th2. Wait until soil temperature reaches 40F. Space plants at 1/m² (30cm khoảng cách). Harden off plants for a week before moving outside.

Harvest: 10 Th2

First harvest approximately 10 Th2 (~365 ngày from transplant). Continue harvesting until first frost (15 Th11). 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

Plan Your Garden Rhubarb

Track Rhubarb from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.

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