When should I plant Rhubarb in Zone 7a?

Start Rhubarb seeds indoors around Feb 4. Transplant outdoors after Mar 18. Expect first harvest around Mar 18.

What is the last frost date for Zone 7a?

The average last spring frost date for Zone 7a is Apr 15. The first fall frost averages Oct 22, giving a 190-day growing season.

Can I grow Rhubarb in Zone 7a?

Yes. Rhubarb needs 90 days to harvest. Zone 7a has a 190-day growing season, which is sufficient.

Growing Rhubarb in Zone 7a

Zone 7a has mild winters and a long growing season — good conditions for Rhubarb. Last frost: Apr 15. First frost: Oct 22.

Planting Calendar

Indoor

Outdoor

Harvest

Feb 4Oct 22

Season: Apr 15 – Oct 22 (190 days)

Zone7a

Last FrostApr 15

First FrostOct 22

Season Length190 days

Days to Harvest90

SunFull Sun

Frost ToleranceHeavy

Spacing1/sqft (12" apart)

When to Plant Rhubarb in Zone 7a

Start Seeds Indoors: Feb 4

Start Rhubarb seeds indoors around Feb 4 (10 weeks before last frost). Optimal germination temperature: 65°F. Germinates in 7–21 days.

Transplant Outdoors: Mar 18

Transplant Rhubarb seedlings outdoors after Mar 18. Wait until soil temperature reaches 40°F. Space plants at 1/sqft (12" apart). Harden off plants for a week before moving outside.

Harvest: Mar 18

First harvest approximately Mar 18 (~365 days from transplant). Continue harvesting until first frost (Oct 22). 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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