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Zone 10B — August

What to Plant in August in Zone 10B

August in Zone 10B: 0 crops to start indoors, 0 to plant or direct sow outside, and 50 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
50 Harvest
Frost risk: Possible

Frost is still possible in Zone 10B: about 1 winter in 9 reaches 32°F. In those winters, the last spring frost typically lands on January 11, with the earliest plausible clearance around December 19. Hold tender crops indoors a while longer.

See full Zone 10B frost outlook

Start Indoors in August

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

Plant Outside in August

Nothing to plant or sow outside in August for Zone 10B.
Next window: October — 7 varieties, including Asian Tempest Garlic, Chengdu Garlic, Creole Red Garlic.

Harvest in August

Plant Type Planted / Sown Harvest Window
All Year Round Lettuce lettuce Jun 16 Aug 19 – Aug 28
Blonde de Paris Lettuce lettuce Jun 16 Aug 5 – Aug 15
Blue Curled Scotch Kale lettuce Jun 16 Aug 10 – Aug 15
Broadleaf Classic Endive lettuce Jun 16 Aug 5 – Aug 15
Burgundy Boston Lettuce lettuce Jun 16 Aug 5 – Aug 10
Buttercrunch Lettuce lettuce Jun 16 Aug 1 – Aug 10
Butterhead Lettuce lettuce Jun 16 Aug 5 – Aug 20
Canary Yellow Swiss Chard lettuce Jun 16 Aug 5 – Aug 15
Catalogna Chicory lettuce Jun 16 Aug 10
Crisphead Lettuce lettuce Jun 16 Aug 23 – Aug 30
Curly Kale lettuce Jun 16 Aug 10 – Aug 20
Dark Green Romaine Lettuce lettuce Jun 16 Aug 15 – Aug 25
Delicatesse Blue Kohlrabi brassica Jun 16 Aug 10 – Aug 15
Delicatesse White Kohlrabi brassica Jun 16 Aug 10 – Aug 15
Dwarf Siberian Kale lettuce Jun 16 Aug 5 – Aug 10
Georgia Southern Collard Greens lettuce Jun 16 Aug 25 – Sep 9
Green Mountain Celtuce lettuce Jun 16 Aug 5
Hot Pink Swiss Chard lettuce Jun 16 Aug 5 – Aug 15
Iceberg Lettuce lettuce Jun 16 Aug 23 – Aug 30
Kagraner Sommer Lettuce lettuce Jun 16 Aug 13
Lacinato Kale lettuce Jun 16 Aug 15 – Aug 20
Little Gem Lettuce lettuce Jun 16 Aug 5 – Aug 11
Lollo Bionda Lettuce lettuce Jun 16 Aug 5 – Aug 15
Lollo Rossa Lettuce lettuce Jun 16 Aug 8 – Aug 11
Magenta Sunset Swiss Chard lettuce Jun 16 Aug 10 – Aug 15
Morris Heading Collard lettuce Jun 16 Aug 30 – Sep 4
Mâche (Corn Salad) lettuce Jun 16 Aug 15 – Sep 8
Napa Cabbage brassica Jun 16 Aug 15 – Aug 25
New Zealand Spinach lettuce Jun 16 Aug 5 – Aug 15
Noble Giant Spinach lettuce Jun 16 Aug 1 – Aug 5
Premier Kale lettuce Jun 16 Aug 5 – Aug 15
Radicchio lettuce Jun 16 Aug 15 – Sep 9
Rainbow Mix Swiss Chard lettuce Jun 16 Aug 5 – Aug 15
Rapini Broccoli Raab brassica Jun 16 Aug 20
Red Romaine Lettuce lettuce Jun 16 Aug 15 – Aug 25
Red-Stem Malabar Spinach lettuce Jun 16 Aug 10 – Aug 25
Romaine Lettuce lettuce Jun 16 Aug 20 – Aug 30
Ruby Red Swiss Chard lettuce Jun 16 Aug 10 – Aug 15
Salad Bowl Green Lettuce lettuce Jun 16 Aug 4 – Aug 5
Summer Bibb Lettuce lettuce Jun 16 Aug 10 – Aug 15
Swiss Chard lettuce Jun 16 Aug 5 – Aug 15
Tango Lettuce lettuce Jun 16 Aug 1
Tom Thumb Lettuce lettuce Jun 16 Aug 5 – Aug 25
Très Fine Maraîchère Frisée lettuce Jun 16 Aug 15
Tuscany Black Kale lettuce Jun 16 Aug 15 – Aug 30
Vates Collard lettuce Jun 16 Aug 15 – Aug 30
Vates Kale lettuce Jun 16 Aug 5 – Aug 10
Vienna Purple Kohlrabi brassica Jun 16 Aug 10 – Aug 20
Vienna White Kohlrabi brassica Jun 16 Aug 10
Winter Density Lettuce lettuce Jun 16 Aug 9 – Aug 15

Key Tasks for August in Zone 10B

  1. 1 Apply 2–3 inches of mulch around heat-sensitive crops to retain moisture and keep root zones cooler. Water deeply and less frequently rather than shallow daily watering.
  2. 2 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
July August in Zone 10B September

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