🌸 Can I Plant Rhubarb in Los Angeles, CA?

2026 planting guide for Zone 10b · Last frost ~January 15 · Growing season ~335 days

✅ YES — Good temps, but watch for heat — highs near 90°F

Temperature conditions are suitable for Rhubarb. Highs near 90°F are on the warm side — make sure plants have plenty of water.

Planting window: Jul 16 – Jul 30
Good to plant now — rhubarb is a perennial, so expect first harvest in 2027.
Live result based on current forecast for Los Angeles, CA · Updates every 6 hours
USDA Zone
10b
Last Spring Frost
~January 15
First Fall Frost
December 15
Growing Season
~335 days
Ideal Temp for Rhubarb
40–75°F
Frost Risk
✅ Tolerant

Growing Rhubarb in Los Angeles

Los Angeles enjoys a nearly year-round growing season in Zone 10b. Frost is rare and brief, typically limited to a few nights in January. The mild, dry Mediterranean climate is ideal for warm-season vegetables most of the year, though cool-season crops like lettuce and broccoli actually prefer the mild winters over the hot, dry summers.

In Los Angeles (last frost around January 15), rhubarb can go out around January — approximately 2 weeks before the last expected frost, making it an early-season opportunity.

Rhubarb thrives between 40°F and 75°F. It tolerates temperatures as low as 20°F, making it a candidate for early spring planting before the last frost date. Expect 365–730 days from transplant to first harvest. Do not harvest in the first year. Leaves are toxic — eat stalks only. Thrives with cold winters.

Frequently Asked Questions

When can I plant rhubarb in Los Angeles, CA?

In Los Angeles (last frost around January 15), rhubarb can go out around January — approximately 2 weeks before the last expected frost, making it an early-season opportunity.

What is the USDA hardiness zone for Los Angeles?

Los Angeles, CA is in USDA Plant Hardiness Zone 10b. The last expected spring frost is around January 15, and the first fall frost arrives around December 15. This zone classification helps you understand which perennials survive winter and when annual vegetables can safely go outdoors.

Is it safe to plant rhubarb outside in Los Angeles right now?

That depends on the current weather forecast. Rhubarb needs temperatures above 20°F (ideally 40–75°F) to thrive. CanIPlant checks your real 7-day forecast and any active frost alerts to give you a live YES, NO, or WAIT answer — just enter your ZIP code.

Can I grow rhubarb in Los Angeles 2026?

Yes — Rhubarb grows well in Los Angeles, CA. With a Zone 10b climate and a growing season of ~335 days, Los Angeles is well-suited for cool-season crops like rhubarb. As a frost-tolerant crop, rhubarb can even go out a few weeks before the last frost date.

Grow Rhubarb in Other Cities

New York, NYChicago, ILHouston, TXPhoenix, AZPhiladelphia, PASan Antonio, TXSan Diego, CADallas, TX

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