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Zone 11A — September

What to Plant in September in Zone 11A

September in Zone 11A: 14 crops to start indoors, 0 to plant or direct sow outside, and 0 entering harvest window. Last frost averages . Reference city: Fort Lauderdale, FL.
Updated August 12, 2026 · Frost data from NOAA 1991-2020 Climate Normals
14 Start Indoors
0 Plant Outside
0 Harvest

Start Indoors in September

Plant Type Start Indoors Transplant Outside Harvest Window
Carentan Leeks allium Sep 27 Oct 18 Jan 16, 2027 – Feb 5, 2027
Charleston Wakefield Cabbage brassica Sep 27 Oct 11 Dec 25
Dutch Yellow Shallots allium Sep 27 Oct 4 Jan 2, 2027 – Feb 1, 2027
Early Jersey Wakefield Cabbage brassica Sep 27 Oct 11 Dec 15 – Dec 25
French Red Shallots allium Sep 27 Oct 4 Jan 2, 2027 – Feb 1, 2027
Giant Musselburgh Leeks allium Sep 27 Oct 18 Jan 26, 2027 – Jan 31, 2027
Holland Red Shallots allium Sep 27 Oct 4 Jan 2, 2027 – Feb 1, 2027
Michihili Cabbage brassica Sep 27 Oct 11 Dec 20
OG American Flag Leeks allium Sep 27 Oct 18 Jan 16, 2027 – Jan 26, 2027
Red Acre Cabbage brassica Sep 27 Oct 11 Dec 25 – Dec 30
Viola and pansy edible flowers flower Sep 13 Oct 18 Dec 17 – Dec 27
Curly Parsley herb Sep 27 Nov 1 Jan 10, 2027 – Jan 20, 2027
Flat-Leaf Parsley herb Sep 27 Nov 1 Jan 10, 2027 – Jan 30, 2027
Imperial Star Artichoke vegetable Sep 27 Nov 1 Jan 30, 2027 – Feb 9, 2027

Plant Outside in September

Nothing to plant or sow outside in September for Zone 11A.
Next window: October — 64 varieties, including Alaska Early Pea, Alfalfa Cover Crop, All Season Cabbage.

Harvest in September

Nothing to harvest in September for Zone 11A.
Next window: November — 17 varieties, including Beauty Pink Radishes, Beauty Purple Radishes, Beauty White Radishes.

Key Tasks for September in Zone 11A

  1. 1 Start 14 varieties indoors this month under grow lights or in a sunny south-facing window. Use a seed-starting mix and bottom heat (70–75°F) for best germination rates.
  2. 2 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.
  3. 3 Begin fall cool-season planting window this month. Direct sow lettuce, spinach, arugula, and radishes now for harvest before hard frost.
  4. 4 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.
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