Planting Guides
When to Plant Squash in Los Angeles: Complete Guide + Best Varieties for Zone 10b
Los Angeles, California
USDA Zone 10b
Last Frost: Feb 15
Last updated: October 30, 2025
Plant squash in Los Angeles from March through September for continuous harvest. Zone 10b's 303-day growing season allows multiple successions of summer squash and extended winter squash production.
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Quick Answer
Plant squash in Los Angeles from March through September. Summer varieties mature in 45-60 days, winter types need 80-110 days.
TL;DR
Los Angeles squash planting thrives from March through September with Zone 10b's extended 303-day growing season. Summer squash varieties like zucchini can be planted every 3-4 weeks for continuous harvest, while winter squash planted in March-April will mature by August-September. The key advantage is avoiding the brief cool period (January-February) while maximizing the long warm season for multiple successive crops.
Frequently Asked Questions
When should I start planting squash seeds in Los Angeles?
Start planting squash seeds in Los Angeles on March 1st for your main crop. Soil temperatures reach the required 60°F (15°C) by early March, and this timing allows summer squash to produce from April through June while winter squash matures by July-August. You can continue succession planting summer varieties every 3-4 weeks through August to maintain continuous harvests throughout the extended 303-day growing season.
Can I grow squash year-round in Los Angeles?
Yes, Los Angeles' Zone 10b climate allows nearly year-round squash growing with strategic timing. Plant summer squash varieties from March through October for harvests lasting until December. The brief cool period from January through February is the only time unsuitable for planting, though established plants may continue producing. Winter squash requires longer seasons (80-110 days), so plant these March through June for proper maturation before the next cool period.
Which squash varieties work best in Los Angeles heat?
Cucurbita pepo 'Yellow Crookneck' and Cucurbita moschata 'Butternut' are the most heat-tolerant varieties for Los Angeles. Crookneck summer squash actually develops better flavor in warm weather, while Butternut winter squash thrives in LA's extended heat. Cucurbita pepo 'Black Beauty'} zucchini also performs well with adequate water. Avoid Cucurbita maxima} varieties like Kabocha in inland valleys during peak summer unless you can provide afternoon shade.
How often should I plant new squash crops in Los Angeles?
Plant new summer squash crops every 3-4 weeks from March through August to maintain continuous production. Each planting produces for 6-8 weeks before declining, so overlapping plantings ensure steady harvests. Winter squash requires only one planting per season due to their long maturation period (80-110 days). This succession strategy prevents overwhelming harvests followed by gaps in production.
What's the biggest challenge growing squash in Los Angeles?
Squash bugs are the primary challenge in Los Angeles' warm climate, completing multiple generations per year and creating heavy infestations. These shield-shaped insects suck plant juices, causing yellowing and wilting. Check plants weekly for bronze egg masses on leaf undersides and remove by hand. Board traps placed overnight attract adults for morning disposal. Powdery mildew also affects coastal areas due to marine layer humidity, requiring wider spacing and drip irrigation to manage.
How do I store winter squash in Los Angeles' warm climate?
Cure winter squash on a sunny patio for 10-14 days at 80-85°F to harden rinds, then move to storage areas maintained at 50-55°F. Los Angeles homes rarely have naturally cool areas, so use air-conditioned rooms kept at 55-60°F, insulated garages below 65°F, or refrigerator produce drawers for smaller quantities. Cucurbita moschata 'Butternut'} stores best (4-6 months), while Cucurbita pepo 'Acorn'} keeps only 6-8 weeks and should not be cured.
Can I grow squash in containers in Los Angeles?
Yes, bush varieties like Cucurbita pepo 'Black Beauty'} zucchini and Cucurbita pepo 'Pattypan'} work well in large containers (minimum 20 gallons) in Los Angeles. Choose containers with excellent drainage and use high-quality potting mix amended with compost. Container growing provides better control over soil conditions and easier pest management. Vining winter squash varieties need too much space for container growing, but Cucurbita pepo 'Delicata'} with its shorter vines (6-8 feet) can work in very large containers with trellis support.
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Emma Chen
Emma runs a small succulent propagation business from her home in San Diego, shipping starter plants and cuttings across the country. She fell into succulents after college when she realized they were the only plants that survived her travel schedule—she was working as a travel nurse at the time. San Diego's mild, dry climate is ideal for outdoor succulent gardens, and Emma's front yard is a living catalog of over 200 varieties. She completed a certificate program in ornamental horticulture and writes about succulent care, propagation techniques, and drought-tolerant garden design. Her writing is calm and reassuring—she knows people feel bad about killing plants, and she wants them to stop worrying so much.
