Skip to main content
Zone 9B — August

What to Plant in August in Zone 9B

August in Zone 9B: 0 crops to start indoors, 0 to plant or direct sow outside, and 23 entering harvest window. Last frost averages February 7. Reference city: Miami, FL.
Updated May 13, 2026 · Frost data from NOAA 1991-2020 Climate Normals
0 Start Indoors
0 Plant Outside
23 Harvest
Frost risk: Cleared

Frost season has cleared in Zone 9B. The last spring frost typically passed by February 7, and the very latest 10% chance closed by March 9. Tender crops are safe to plant out.

See full Zone 9B frost outlook →

Start Indoors in August

Nothing to start seeds indoors in August for Zone 9B.
Next window: December — 4 varieties, including California Bluebell, Giant Maximum Mix Snapdragon Flowers, Texas 1015Y SuperSweet Onion.

Plant Outside in August

Nothing to plant or sow outside in August for Zone 9B.
Next window: September — 1 variety, including Nantes Carrot (fall planting).

Harvest in August

Plant Type Planted / Sown Harvest Window
Winter rye cover crop stands cover crop Feb 7 Aug 6 – Sep 15
All Year Round lettuce Jun 9 Aug 12 – Aug 21
Blue Curled Scotch lettuce Jun 9 Aug 3 – Aug 8
Crisphead lettuce Jun 9 Aug 16 – Aug 23
Curly Kale lettuce Jun 9 Aug 3 – Aug 13
Dark Green Romaine lettuce Jun 9 Aug 8 – Aug 18
Georgia Southern Collard Greens lettuce Jun 9 Aug 8 – Aug 28
Iceberg lettuce Jun 9 Aug 16 – Aug 23
Lacinato Kale lettuce Jun 9 Aug 8 – Aug 13
Lollo Rossa lettuce Jun 9 Aug 1 – Aug 4
Magenta Sunset lettuce Jun 9 Aug 3 – Aug 8
Morris Heading lettuce Jun 9 Aug 23 – Aug 28
Mâche (Corn Salad) lettuce Jun 9 Aug 8 – Sep 1
Napa Cabbage brassica Jun 9 Aug 18 – Sep 7
Radicchio lettuce Jun 9 Aug 8 – Sep 2
Red Romaine lettuce Jun 9 Aug 8 – Aug 18
Red-Stem Malabar Spinach lettuce Jun 9 Aug 3 – Aug 18
Romaine Lettuce lettuce Jun 9 Aug 13 – Aug 23
Ruby Red lettuce Jun 9 Aug 3 – Aug 8
Summer Bibb lettuce Jun 9 Aug 3 – Aug 8
Tuscany Black lettuce Jun 9 Aug 8 – Aug 23
Vates Collard lettuce Jun 9 Aug 8 – Aug 23
Winter Density lettuce Jun 9 Aug 2 – Aug 8

Key Tasks for August in Zone 9B

  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 9B planting calendar
July August in Zone 9B September

Get a Personalized August Calendar

SoilStack builds your exact planting schedule from your ZIP code — day-by-day tasks, weather prompts, and harvest tracking included.

Start Your Free Garden Calendar