Planting Guides

When to Plant Carrots in Los Angeles: Zone 10b Dates + Best Varieties

Los Angeles, California

USDA Zone 10b

Last Frost: Feb 15

Last updated: October 30, 2025

Plant carrots in Los Angeles from October through February for the longest window. Coastal areas can sow through March. Zone 10b's mild winters make fall and winter the prime carrot seasons.

AAisha Patel

October 30, 2025

Fresh carrots harvested from a Los Angeles Zone 10b garden with California landscaping — — Image © PlantReference.org 2026

Quick Answer

Sow carrot seeds outdoors October through February in Los Angeles for extended winter harvest. Coastal areas can plant through March before summer heat arrives.

TL;DR

Los Angeles's Zone 10b provides a 303-day frost-free season between the February 15 last frost and December 15 first frost, but carrots actually perform best during the cooler months most cities can't use. Sow from October through February for the longest window, with coastal areas extending through March. Summer heat—not frost—is the limiting factor. Daucus carota subsp. sativus 'Nantes' thrives in LA's mild winters, while Daucus carota subsp. sativus 'Danvers 126' handles the heavy clay common across the basin.

Frequently Asked Questions

When should I start planting carrots in Los Angeles?

Start sowing carrot seeds outdoors in October as summer heat fades. Continue succession sowings every 2-3 weeks through February, with coastal areas extending through March. This October-to-February window is LA's prime carrot season—mild daytime temperatures in the 60-70°F range and cool nights produce the sweetest roots.

What is the best carrot variety for Los Angeles?

Daucus carota subsp. sativus 'Nantes' is the top variety for LA's mild winters. The cylindrical roots produce the sweetest, most tender eating quality, and winter temperatures sit in the ideal range for Nantes flavor development.

Can I grow carrots year-round in Los Angeles?

Nearly—but not quite. Most LA neighborhoods have a 3-4 month summer gap (June-September) when soil temperatures exceed the 75°F threshold. Coastal areas within marine layer influence have a shorter gap (July-September). Year-round production is theoretically possible in the coolest coastal microclimates with shade cloth, but it's not practical for most gardeners.

How much water do carrots need in Los Angeles?

Carrots need 1-1.5 inches of water per week. LA receives only about 15 inches of annual rainfall (concentrated November-March), so irrigation is essential for most of the growing season. Drip systems deliver water efficiently—critical given LA's high water costs. Mulch reduces irrigation frequency by 30-40%.

Does LA's clay soil need pH adjustment for carrots?

Often yes. LA basin clay typically runs pH 7.0-8.0, above the ideal carrot range of 6.0-6.8. Test through the UC Cooperative Extension before amending. If pH exceeds 7.0, elemental sulfur brings it down. Raised beds with imported soil give you pH control from the start.

What's the difference between coastal and inland LA for carrot growing?

Coastal neighborhoods (Santa Monica, Venice, Long Beach) stay 10-15°F cooler than inland valleys (San Fernando, San Gabriel) during summer. The marine layer extends the carrot growing window by 4-6 weeks on the coast. Inland areas face a longer summer heat gap and more extreme temperature swings. Coastal gardeners can sow through March; inland gardeners should stop by February and focus on harvest.

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Tagged with

#carrots #Los Angeles gardening #Zone 10b #planting guide #Nantes #clay soil #winter carrots #Southern California vegetable garden #water-wise #Mediterranean climate

Written By

Aisha Patel

Aisha manages a small tropical nursery on the east side of Houston, specializing in plants that can handle the Gulf Coast's humidity, heat, and unpredictable flooding. She studied horticulture in college and worked at a wholesale grower before opening her own operation. Growing up, her parents kept a kitchen garden with okra, bitter gourd, and curry leaf plants—a tradition she's continued. Houston's subtropical climate lets her grow things most of the country can't, but it also means dealing with fungal issues, standing water, and summers where it's too hot for even tomatoes. Aisha writes about tropical and subtropical plant care, humidity management, and working with heavy clay soils.