When should I plant Rhubarb in Zone 1b?

Start Rhubarb seeds indoors around Mar 16. Transplant outdoors after Apr 27. Expect first harvest around Apr 27.

What is the last frost date for Zone 1b?

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

Can I grow Rhubarb in Zone 1b?

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

Growing Rhubarb in Zone 1b

Zone 1b has harsh winters and a short growing season. Start Rhubarb early indoors to maximize your harvest window. Viimane öökülm: May 25. Esimene öökülm: Aug 28.

Planting Calendar

Indoor

Outdoor

Harvest

Mar 16Aug 28

Season: May 25 – Aug 28 (95 päeva)

Tsoon1b

Viimane öökülmMay 25

Esimene öökülmAug 28

Hooaeg95 päeva

Saak90 päeva

PäikeTäispäike

When to Plant Rhubarb in Zone 1b

Start Seeds Indoors: Mar 16

Start Rhubarb seeds indoors around Mar 16 (10 nädalat enne viimast külma). Optimal germination temperature: 65F. Germinates in 7-21 days.

Transplant Outdoors: Apr 27

Transplant Rhubarb seedlings outdoors after Apr 27. Wait until soil temperature reaches 40F. Space plants at 1/m² (30cm vahekaugus). Harden off plants for a week before moving outside.

Harvest: Apr 27

First harvest approximately Apr 27 (~365 päeva from transplant). Continue harvesting until first frost (Aug 28). 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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