When should I plant Rhubarb in Zone 11a?

Start Rhubarb seeds indoors around Nov 19. Transplant outdoors after Dec 31. Expect first harvest around Dec 31.

What is the last frost date for Zone 11a?

The average last spring frost date for Zone 11a is Jan 28. The first fall frost averages Dec 22, giving a 328-day growing season.

Can I grow Rhubarb in Zone 11a?

Yes. Rhubarb needs 90 days to harvest. Zone 11a has a 328-day growing season, which is sufficient.

Growing Rhubarb in Zone 11a

Zone 11a has a year-round growing season. Rhubarb can be planted almost any time with proper planning. Darrera gelada: Jan 28. Primera gelada: Dec 22.

Planting Calendar

Indoor

Outdoor

Harvest

Nov 19Dec 22

Season: Jan 28 – Dec 22 (328 dies)

Zona11a

Darrera geladaJan 28

Primera geladaDec 22

Temporada328 dies

Collita90 dies

SolSol Ple

When to Plant Rhubarb in Zone 11a

Start Seeds Indoors: Nov 19

Start Rhubarb seeds indoors around Nov 19 (10 setmanes abans de l’última gelada). Optimal germination temperature: 65F. Germinates in 7-21 days.

Transplant Outdoors: Dec 31

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

Harvest: Dec 31

First harvest approximately Dec 31 (~365 dies from transplant). Continue harvesting until first frost (Dec 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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