Skip to main content
Zone 11B — September

What to Plant in September in Zone 11B

September in Zone 11B: 117 crops to start indoors, 0 to plant or direct sow outside, and 0 entering harvest window. No freeze on record. Reference city: Key West, FL.
Updated August 12, 2026 · Frost data from NOAA 1991-2020 Climate Normals
117 Start Indoors
0 Plant Outside
0 Harvest

Start Indoors in September

Plant Type Start Indoors Transplant Outside Harvest Window
Charleston Wakefield Cabbage brassica Sep 20 Oct 25 Jan 3
Early Jersey Wakefield Cabbage brassica Sep 20 Oct 25 Dec 29, 2026 – Jan 8, 2027
Michihili Cabbage brassica Sep 20 Oct 25 Jan 3
Red Acre Cabbage brassica Sep 20 Oct 25 Jan 8, 2027 – Jan 13, 2027
Aji Amarillo Peppers pepper Sep 27 Nov 29 Feb 27, 2027 – Mar 29, 2027
Aji Dulce Peppers pepper Sep 27 Nov 29 Feb 27, 2027 – Mar 19, 2027
All Season Cabbage brassica Sep 27 Nov 1 Jan 10, 2027 – Jan 20, 2027
All Year Round Cauliflower brassica Sep 27 Nov 1 Jan 5
Anaheim Peppers pepper Sep 27 Nov 29 Feb 14, 2027 – Feb 22, 2027
Ancho Grande Hot Peppers pepper Sep 27 Nov 29 Feb 12, 2027 – Feb 22, 2027
Barletta, Pearly White Onions allium Sep 13 Nov 15 Jan 29, 2027 – Feb 3, 2027
Beefsteak Tomatoes tomato Sep 27 Nov 29 Feb 17, 2027 – Feb 22, 2027
Bhut Jolokia Ghost Pepper pepper Sep 20 Nov 29 Feb 27, 2027 – Mar 29, 2027
Big Jim Hatch Chile pepper Sep 20 Nov 29 Feb 7, 2027 – Feb 12, 2027
Birds Eye Hot Peppers pepper Sep 27 Nov 29 Mar 9, 2027 – Mar 19, 2027
Black Beauty Eggplant vegetable Sep 20 Nov 29 Feb 12, 2027 – Feb 27, 2027
Brandywine Tomatoes tomato Sep 27 Nov 29 Feb 17, 2027 – Feb 27, 2027
Brunswick Cabbage brassica Sep 27 Nov 1 Jan 30
Calabrese Broccoli brassica Sep 27 Nov 1 Jan 5
Cardoon (Purple Artichoke Thistle) vegetable Sep 20 Nov 22 Perennial — see plant page
Carentan Leeks allium Sep 13 Nov 1 Jan 30, 2027 – Feb 19, 2027
Carolina Reaper peppers pepper Sep 13 Nov 29 Feb 27, 2027 – Mar 29, 2027
Casper Eggplant vegetable Sep 27 Nov 29 Feb 12
Catmint herb Sep 27 Nov 15 Perennial — see plant page
Cayenne Peppers pepper Sep 27 Nov 29 Feb 7, 2027 – Feb 22, 2027
Cherokee Purple Tomatoes tomato Sep 27 Nov 29 Feb 15, 2027 – Feb 22, 2027
Cherry Bomb peppers pepper Sep 13 Nov 29 Feb 12, 2027 – Feb 17, 2027
Chinese 5-Color Peppers pepper Sep 27 Nov 29 Feb 12, 2027 – Feb 22, 2027
Chocolate Bell Sweet Peppers pepper Sep 27 Nov 29 Feb 2, 2027 – Feb 17, 2027
Chocolate Habanero Hot Peppers pepper Sep 27 Nov 29 Feb 22, 2027 – Mar 14, 2027
Copenhagen Cabbage brassica Sep 27 Nov 1 Jan 5
Corno di Toro Pepper pepper Sep 20 Nov 29 Feb 12, 2027 – Feb 17, 2027
Crimson Forest Bunching Onions allium Sep 27 Nov 15 Jan 14
Curly Parsley herb Sep 13 Nov 15 Jan 24, 2027 – Feb 3, 2027
Danish Ballhead Cabbage brassica Sep 27 Nov 1 Feb 9, 2027 – Feb 19, 2027
Datil peppers pepper Sep 13 Nov 29 Feb 27, 2027 – Mar 19, 2027
Devils Tongue Yellow Hot Peppers pepper Sep 27 Nov 29 Feb 27, 2027 – Mar 19, 2027
Di Cicco Broccoli brassica Sep 27 Nov 1 Dec 16 – Dec 19
Drumhead Cabbage brassica Sep 27 Nov 1 Jan 30, 2027 – Feb 9, 2027
Early Purple Broccoli brassica Sep 27 Nov 1 Jan 5
Emerald Giant Sweet Peppers pepper Sep 27 Nov 29 Feb 12, 2027 – Feb 22, 2027
English Thyme herb Sep 13 Nov 15 Perennial — see plant page
English White Daisy Flowers flower Sep 13 Nov 15 Perennial — see plant page
Evergreen Bunching Onions allium Sep 27 Nov 15 Jan 14, 2027 – Jan 19, 2027
Firecracker Hot Peppers pepper Sep 27 Nov 29 Feb 17, 2027 – Mar 29, 2027
Fish Peppers pepper Sep 27 Nov 29 Feb 7, 2027 – Feb 17, 2027
Flat-Leaf Parsley herb Sep 13 Nov 15 Jan 24, 2027 – Feb 13, 2027
Florida Market Eggplant vegetable Sep 27 Nov 29 Feb 17, 2027 – Feb 27, 2027
Fresno Peppers pepper Sep 27 Nov 29 Feb 12, 2027 – Feb 17, 2027
Giant Maximum Mix Snapdragon Flowers flower Sep 13 Nov 15 Feb 3, 2027 – Feb 18, 2027
Giant Musselburgh Leeks allium Sep 13 Nov 1 Feb 14
Glory of Enkhuizen Cabbage brassica Sep 27 Nov 1 Jan 30
Gochugaru Korean Peppers pepper Sep 27 Nov 29 Feb 12
Golden Acre Cabbage brassica Sep 27 Nov 1 Jan 5
Golden Celery vegetable Sep 6 Nov 22 Feb 15, 2027 – Feb 25, 2027
Golden Marconi Sweet Peppers pepper Sep 27 Nov 29 Feb 2, 2027 – Feb 17, 2027
Grano Red Onions allium Sep 13 Nov 15 Mar 15
Grano White Onions allium Sep 13 Nov 15 Mar 15
Green Globe Artichoke vegetable Sep 20 Nov 29 Perennial — see plant page
Hatch Green Chile (NM 6-4) Peppers pepper Sep 27 Nov 29 Feb 7, 2027 – Feb 17, 2027
Holiday Marbles Hot Peppers pepper Sep 27 Nov 29 Feb 27, 2027 – Mar 19, 2027
Hungarian Hot Wax Pepper pepper Sep 20 Nov 29 Feb 2, 2027 – Feb 12, 2027
Igloo Cauliflower brassica Sep 27 Nov 1 Jan 5, 2027 – Jan 10, 2027
Imperial Star Artichoke vegetable Sep 13 Nov 15 Feb 13, 2027 – Feb 23, 2027
Italian Oregano herb Sep 27 Nov 15 Perennial — see plant page
Jalapeño Peppers pepper Sep 27 Nov 29 Feb 2, 2027 – Feb 12, 2027
Lemon Habanero Hot Peppers pepper Sep 27 Nov 29 Feb 22, 2027 – Mar 14, 2027
Lemongrass herb Sep 27 Nov 29 Perennial — see plant page
Long Green Louisiana Eggplant vegetable Sep 27 Nov 29 Feb 2, 2027 – Feb 7, 2027
Long Ping Tung Eggplant vegetable Sep 27 Nov 29 Jan 23, 2027 – Jan 28, 2027
Long Purple Italian Eggplant vegetable Sep 27 Nov 29 Feb 12
Mariachi Peppers pepper Sep 27 Nov 29 Feb 3, 2027 – Feb 12, 2027
Mortgage Lifter Tomatoes tomato Sep 27 Nov 29 Feb 17, 2027 – Feb 22, 2027
NuMex Twilight Hot Peppers pepper Sep 27 Nov 29 Feb 27, 2027 – Mar 29, 2027
OG American Flag Leeks allium Sep 13 Nov 1 Jan 30, 2027 – Feb 9, 2027
Orange Habanero Hot Peppers pepper Sep 27 Nov 29 Feb 22, 2027 – Mar 14, 2027
Orange Horizon Sweet Peppers pepper Sep 27 Nov 29 Feb 12, 2027 – Feb 17, 2027
Pandora Striped Eggplant vegetable Sep 27 Nov 29 Feb 12, 2027 – Feb 17, 2027
Pasilla de Oaxaca Hot Peppers pepper Sep 27 Nov 29 Feb 12, 2027 – Feb 22, 2027
Pepperoncini Pepper pepper Sep 27 Nov 29 Feb 2, 2027 – Feb 12, 2027
Pimento Sweet Peppers pepper Sep 27 Nov 29 Feb 22, 2027 – Feb 27, 2027
Poblano Peppers pepper Sep 27 Nov 29 Feb 2
Pretty Purple Hot Peppers pepper Sep 27 Nov 29 Feb 27, 2027 – Mar 29, 2027
Purple Beauty Sweet Peppers pepper Sep 27 Nov 29 Feb 7, 2027 – Feb 12, 2027
Purple Tiger Hot Peppers pepper Sep 27 Nov 29 Feb 27, 2027 – Mar 9, 2027
Red Burgundy Onions allium Sep 13 Nov 15 Mar 5, 2027 – Mar 15, 2027
Red Caribbean Habanero Hot Peppers pepper Sep 27 Nov 29 Feb 22, 2027 – Mar 14, 2027
Red Cayenne Hot Peppers pepper Sep 27 Nov 29 Feb 12, 2027 – Feb 22, 2027
Red Cherry Hot Peppers pepper Sep 27 Nov 29 Feb 12, 2027 – Feb 17, 2027
Red Mushroom Hot Peppers pepper Sep 27 Nov 29 Feb 12, 2027 – Feb 22, 2027
Red Scotch Bonnet Pepper pepper Sep 20 Nov 29 Mar 4, 2027 – Mar 29, 2027
Roman Chamomile herb Sep 27 Nov 15 Perennial — see plant page
Rosemary herb Sep 13 Nov 29 Perennial — see plant page
Round Mauve Eggplant vegetable Sep 27 Nov 29 Feb 17, 2027 – Feb 27, 2027
Rue herb Sep 27 Nov 15 Perennial — see plant page
San Marzano Tomatoes tomato Sep 27 Nov 29 Feb 15, 2027 – Feb 25, 2027
Santa Fe Grande Hot Peppers pepper Sep 27 Nov 29 Feb 12, 2027 – Feb 17, 2027
Savoy Perfection Cabbage brassica Sep 27 Nov 1 Jan 30, 2027 – Feb 4, 2027
Serrano Peppers pepper Sep 27 Nov 29 Feb 7, 2027 – Feb 17, 2027
Snowball Self-Blanche Cauliflower brassica Sep 27 Nov 1 Jan 5
Sunbright Yellow Sweet Peppers pepper Sep 27 Nov 29 Feb 12, 2027 – Feb 17, 2027
Tabasco Hot Peppers pepper Sep 27 Nov 29 Feb 17, 2027 – Feb 27, 2027
Tall Utah 52-70 Celery vegetable Sep 13 Nov 29 Mar 9, 2027 – Apr 8, 2027
Tendercrisp Celery vegetable Sep 6 Nov 22 Feb 20, 2027 – Mar 7, 2027
Tepin Hot Peppers pepper Sep 13 Nov 29 Mar 29, 2027 – Jun 17, 2027
Thai Hot Peppers pepper Sep 27 Nov 29 Feb 12, 2027 – Feb 22, 2027
Trinidad Moruga Scorpion peppers pepper Sep 13 Nov 29 Feb 17, 2027 – Mar 29, 2027
Turkish Orange Eggplant vegetable Sep 27 Nov 29 Feb 22, 2027 – Feb 27, 2027
Violetta Purple Cauliflower brassica Sep 27 Nov 1 Jan 5
White Cloud Sweet Peppers pepper Sep 27 Nov 29 Feb 7, 2027 – Feb 12, 2027
White Lisbon Bunching Onions allium Sep 27 Nov 15 Jan 14
Wormwood herb Sep 27 Nov 15 Perennial — see plant page
Yellow Jalapeno (Caloro) Hot Peppers pepper Sep 27 Nov 29 Feb 12, 2027 – Feb 22, 2027
Yellow Mushroom Hot Peppers pepper Sep 27 Nov 29 Feb 12, 2027 – Feb 22, 2027
Yellow Scotch Bonnet Hot Peppers pepper Sep 27 Nov 29 Feb 27, 2027 – Mar 29, 2027
Yolo Wonder Sweet Peppers pepper Sep 27 Nov 29 Feb 7, 2027 – Feb 17, 2027
Habanero Pepper pepper Sep 20 Dec 6 Mar 6, 2027 – Apr 5, 2027

Plant Outside in September

Nothing to plant or sow outside in September for Zone 11B.
Next window: October — 18 varieties, including Candy Onion, Caraway, Charleston Wakefield Cabbage.

Harvest in September

Nothing to harvest in September for Zone 11B.
Next window: November — 4 varieties, including Black Oil Sunflower Microgreens, Chervil, Rambo Radish Microgreens.

Key Tasks for September in Zone 11B

  1. 1 Start 117 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 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 11B planting calendar
August September in Zone 11B October

Get a Personalized September 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