When should I plant Rhubarb in Zone 3b?

Start Rhubarb seeds indoors around Mar 6. Transplant outdoors after Apr 17. Expect first harvest around Apr 17.

What is the last frost date for Zone 3b?

The average last spring frost date for Zone 3b is May 15. The first fall frost averages Sep 22, 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.

Kweken van Rhubarb in Zone 3b

Zone 3b has harsh winters and a short growing season. Start Rhubarb early indoors to maximize your harvest window. Laatste vorst: May 15. Eerste vorst: Sep 22.

Planting Calendar

Indoor

Outdoor

Harvest

Mar 6Sep 22

Season: May 15 – Sep 22 (130 dagen)

Zone3b

Laatste vorstMay 15

Eerste vorstSep 22

Seizoen130 dagen

Oogst90 dagen

ZonVolle Zon

When to Plant Rhubarb in Zone 3b

Start Seeds Indoors: Mar 6

Start Rhubarb seeds indoors around Mar 6 (10 weken voor de laatste vorst). Optimal germination temperature: 65F. Germinates in 7-21 days.

Transplant Outdoors: Apr 17

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

Harvest: Apr 17

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

Rhubarb in Andere 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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