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Zone 10B — May

What to Plant in May in Zone 10B

May in Zone 10B: 0 crops to start indoors, 0 to plant or direct sow outside, and 27 entering harvest window. About 1 winter in 9 freezes; in those winters the last frost averages January 11. Reference city: Los Angeles, CA.
Updated August 12, 2026 · Frost data from NOAA 1991-2020 Climate Normals
0 Start Indoors
0 Plant Outside
27 Harvest
Frost risk: Cleared

Frost season has cleared in Zone 10B: about 1 winter in 9 reaches 32°F. In those winters, the last spring frost typically passed by January 11, and the very latest 10% chance closed by February 10. Tender crops are safe to plant out.

See full Zone 10B frost outlook

Start Indoors in May

Nothing to start seeds indoors in May for Zone 10B.
Next window: September — 1 variety, including Texas 1015Y SuperSweet Onion.

Plant Outside in May

Nothing to plant or sow outside in May for Zone 10B.
Next window: June — 88 varieties, including All Year Round Lettuce, America Spinach, Astro Arugula.

Harvest in May

Plant Type Planted / Sown Harvest Window
Atlantic Giant Pumpkin squash Jan 18 May 8
Big Max Pumpkin squash Jan 18 May 13 – May 18
Birds Eye Hot Peppers pepper Jan 25 May 5 – May 15
Bloody Butcher Corn vegetable Jan 25 May 5 – May 15
Carolina Cross Watermelon melon Jan 25 May 5
Chayote squash vegetable Jan 25 May 25 – Jun 24
Cinderella Pumpkin squash Jan 18 May 13
Goldrush Potato root vegetable Jan 18 May 9 – May 18
Grano Red Onions allium Jan 11 May 11
Grano White Onions allium Jan 11 May 11
Green Hubbard Winter Squash squash Jan 18 May 8
Green Striped Cushaw Crookneck Winter Squash squash Jan 18 May 3
Harris Model Parsnips root vegetable Jan 18 May 13 – May 18
Honeydew Melon melon Jan 25 May 5 – May 20
Indian Spring Mix Hollyhock Flowers flower Jan 11 May 11 – Jul 10
Kennebec Potato root vegetable Jan 18 May 8 – Jun 2
Long Island Cheese Winter Squash squash Jan 18 May 6
Luffa gourds vegetable Jan 25 May 5 – May 25
Mammoth Sandwich Island Salsify root vegetable Jan 18 May 18
Pacific Giant Pumpkin squash Jan 18 May 13 – May 23
Rainbow Corn vegetable Jan 18 May 3 – May 13
Red Burgundy Onions allium Jan 11 May 1 – May 11
Summer Carnival Mix Hollyhock Flowers flower Jan 11 May 11 – Jul 10
Tall Utah 52-70 Celery vegetable Jan 25 May 5 – Jun 4
Tepin Hot Peppers pepper Jan 25 May 25 – Aug 13
Waltham Butternut Squash squash Jan 25 May 5 – May 25
Habanero Pepper pepper Feb 1 May 2 – Jun 1

Key Tasks for May in Zone 10B

  1. 1 Check soil moisture before watering — stick a finger 2 inches into the soil. Water only when the soil is dry at that depth. Consistent moisture is more important than frequency.
Back to full Zone 10B planting calendar
April May in Zone 10B June

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