September is the month the calendar and the thermometer finally agree. In most parts of the country, the heat is beginning to break, and the days are noticeably shorter — two signals the garden has been waiting for. In cold winter zones, September is a sprint to the finish: a few seeds can still go in the ground, but the window is closing fast, and the emphasis shifts to transplanting and harvesting. For mild-winter zones, September is prime planting season — the single best month to get cool-season crops in the ground for fall. And for warm-winter zones, September is the real beginning of the gardening year: heat is easing, transplants are going out, and the prime growing season is just getting started.
Cold Winter Zones (3–7): The direct-sow window is nearly closed, but it is not gone. Radishes are the last reliable bet — fast enough to mature before October's frost if you sow them in the first week of September. Brassica transplants started in July and August are the main event now: get them in the ground while there are still 6–8 weeks of growing weather ahead—if you have not ordered yet, order today.
Mild Winter Zones (8–9a): September is your month. Cool-season crops of every kind — leafy greens, root vegetables, brassicas, alliums — go in now. August indoor starts are hardening off and moving outside. Short-day onion transplants are going in. The fall garden is assembling itself in real time, and the seed orders that support it need to happen now.
Warm Winter Zones (9b–12): The turning point has arrived. September is when the fall and winter garden takes physical shape in warm-winter zones. Brassica transplants started in August and will go outside as temperatures ease. Direct sowing of cool-season crops is broadly open. The fall season that defines gardening here — the one that runs from October through March — depends on seeds ordered and planted this month.
50
100
true
//store.trueleafmarket.com/cdn/shop/t/54/assets/review-fallback.json?v=33078429469613971781712858278
![Legend: H for Heirloom, O for Organic, A for AAS Winner, F for staff favorites]()
Squash Seeds - Summer - Zucchini Black Beauty
60-70 days. Black Beauty Zucchini Summer Squash Seeds. Cucurbita pepo. Non-GMO. Open Pollinated. AKA: Courgette. One of the most productive crops to ever find its way into the home garden,...
Squash Seeds - Summer - Crookneck
50-60 days. Crookneck Summer Squash Seeds. Cucurbita pepo. Non-GMO. Open Pollinated. Non-GMO Summer Crookneck squash is ready in about 58 days. The flesh of this squash is bumpy and yellow....
Squash Seeds - Summer - Early Prolific Straightneck
50-60 days. Early Prolific Straightneck Summer Squash Seeds. Cucurbita pepo. Non-GMO. Open Pollinated. Non-GMO Early Prolific Staightneck Summer Squash is ready to harvest from the vine after 52 days. Early...
Squash Seeds - Summer - Crookneck (Organic)
Ready in about 58 days, Organic Summer Crookneck Squash is perfect for the summer garden. Bumpy skin highlights a yellow fleshy squash. When the fruit is 5-6 inches long, it...
Squash Seeds - Summer - Zucchini, Endurance BC, F1
Summer Squash, Endurance BC-2 F1. Cucurbita pepo. AKA: Zucchini. Squashes started showing up in Italian kitchens as early as 1600, the "Zucchini" variety probably originated around 1850. Extremely productive, and...
Squash Seeds - Summer - Zucchini Golden
55-65 days. Golden Zucchini Summer Squash Seeds. Cucurbita pepo. Annual. Open Pollinated. Non-GMO Heirloom Golden Zucchini is the summer squash to grow in the garden. it's ready in 55 days...
Squash Seeds - Summer - Golden Glory Hybrid
53 days. The 7 to 8 inch, 2-3" in diameter, smooth, waxy-skinned, gold fruits have creamy white, excellent tasting flesh. The vigorous open plant bears fruit of superior quality and...
Squash Seeds - Summer - Cocozelle Zucchini
50-60 Days to maturity. Cucurbita pepo. Cocozelle Zucchini Seeds. Non-GMO, annual, open-pollinated, heirloom. Suitable for growing in garden plots, raised beds, and containers. A traditional Italian heirloom introduced in the...
Zucchini Seeds - Cocozelle - Organic
(48 days) Introduced prior to 1885. An Italian heirloom still widely grown today. Bush type squash with long cylindrical, dark green, zucchini. Organic Cocozelle Zucchini Squash Seeds Cocozelle has very...
Squash Seeds - Summer - Zucchini Grey
45-50 days. Zucchini Grey Summer Squash Seeds. Cucurbita pepo. Non-GMO. Open Pollinated. An Old World heirloom native to Italy, the Zucchini Grey summer squash has been a Mediterranean favorite since...
Squash - Summer - Dark Green Zucchini (Organic)
Cucurbita pepo. (45-65 days) An early vigorous bush zucchini with straight, smooth, dark-green mottled fruits. Tastiest at 6-8" with pale greenish-white, firm flesh. Great for market growers and easy to...
Squash Seeds - Summer - Sunburst Hybrid
Non-GMO Hybrid Sunburst Squash is a buttery-yellow scallop summer squash. Best picked when it grows 2-3 inches wide. Pattypan squash variety with a thin skin with a bush habit that...
Squash Seeds - Summer - Fordhook Zucchini
50-60 Days to maturity. Cucurbita pepo. Fordhook Summer Zucchini Seeds. Non-GMO, annual, open-pollinated, heirloom. 1942 AAS winner. Suitable for growing in fields, garden plots, raised beds, and greenhouses. Resistant to...
Squash Seeds - Summer - Zucchini Elite Hybrid
46 days. A new virus tolerant strain which produces high yields of attractive, truly green, slightly tapered fruit with few freckles of yellow. Open areas promote ease in harvesting. Continues...
Zucchini Seeds - Caserta
Cucurbita pepo (65 days) An early bush cocozelle zucchini that produces huge yields of 16" fruit. Much better eaten at the 6-8" size. Zucchini Seeds - Caserta Light green skin...
Squash Seeds - Costata Romanesco Zucchini
Cucurbita pepo (52 days) A sought-after Italian heirloom grown around Rome for years. The zucchini is grey-green, has fluted edges or ribs. When cut these fluted edges give them a...
Squash Seeds - Korean, Summer - King Ka Ae -...
Squash Seeds - Korean, Summer - King Ka Ae - Hybrid. Non-GMO. Cucurbita moschata. 55-70 days to maturity after transplanting. Warm season annual. Excellent tasty Korean summer squash. Fruits have...
Squash Seeds - Summer - Scallop Yellow Bush (Organic)
49 days to maturity. Cucurbita pepo. Organic Scallop Yellow Bush Summer Squash Seeds. Non-GMO, annual, heirloom, open-pollinated, organic. This is suitable for growing in fields, containers, garden plots, raised beds,...
Squash Seeds - Summer - Scallop Yellow Bush
Cucurbita pepo (49 days) Scallop Yellow Bush is a bush type squash that produces nice yields of flat, round fruit. They remind me of flying saucers. Many times called Patty...
Zucchini Seeds - Round
Cucurbita pepo Round Zucchini is a stunning plant with speckled green leaves born on a robust bush-type plant. Super fast growing and are generally eaten when they are 3-4" in...
Squash Seeds - Summer - Zucchini Greyzinni Hybrid
50 days. High-yielding, 5 to 6 inch, attractive heavily striped, light green-grey zucchini with fine eating quality and creamy, sweet flavor. These somewhat blocky fruits have a slight taper. Open-spaced...
Squash Seeds - Summer - Fordhook Zucchini (Organic)
50 to 60 days to maturity. Cucurbita pepo. Organic Fordhook Zucchini Summer Squash Seeds. Non-GMO, annual, heirloom, open-pollinated, organic. This is suitable for fields, garden plots, raised beds, and containers....
[
{
"featured_image": "files/Squash-Seeds-Summer-Zucchini-Black-Beauty-Organic-comp.jpg",
"secondary_image": "products/SeedPouch_3ed9551e-5bbb-4a0d-932c-25e2358a5056.jpg",
"price": 299,
"handle": "squash-summer-zucchini-black-beauty-seeds",
"title": "Squash Seeds - Summer - Zucchini Black Beauty",
"url": "/products/squash-summer-zucchini-black-beauty-seeds",
"available": true
},
{
"featured_image": "products/squash-summer-zucchini-black-beauty-seed-wm_700_7c6e7a1d-3f66-4b7f-8a6c-cff952f84fc3.jpg",
"secondary_image": "",
"price": 339,
"handle": "squash-summer-zucchini-black-beauty-organic-seeds",
"title": "Squash Seeds - Summer - Zucchini Black Beauty (Organic)",
"url": "/products/squash-summer-zucchini-black-beauty-organic-seeds",
"available": true
},
{
"featured_image": "files/Squash-Seeds-Summer-Crookneck-comp.jpg",
"secondary_image": "products/Seed_Pouch_1_b8076c39-cd49-46df-96d5-cd574b525bc9.jpg",
"price": 299,
"handle": "squash-summer-crookneck-seeds",
"title": "Squash Seeds - Summer - Crookneck",
"url": "/products/squash-summer-crookneck-seeds",
"available": true
},
{
"featured_image": "files/Squash-Seeds-Summer-Early-Prolific-Straightneck-Comp.jpg",
"secondary_image": "products/Seed_Pouch_1_8bf758b3-7e98-4849-9c82-61e9aed0e83b.jpg",
"price": 299,
"handle": "squash-summer-early-prolific-straightneck-seeds",
"title": "Squash Seeds - Summer - Early Prolific Straightneck",
"url": "/products/squash-summer-early-prolific-straightneck-seeds",
"available": true
},
{
"featured_image": "files/Squash-Seeds-Summer-Zucchini-Cashflow-Hybrid-comp.jpg",
"secondary_image": "products/Seed_Pouch_1_2d2f46e9-ce5d-4f6c-9abb-bb7b667d9dd6.jpg",
"price": 429,
"handle": "squash-summer-zucchini-cashflow-hybrid-seeds",
"title": "Squash Seeds - Summer - Zucchini Cashflow Hybrid",
"url": "/products/squash-summer-zucchini-cashflow-hybrid-seeds",
"available": true
},
{
"featured_image": "files/squash-summer-crookneck-organic-seeds-comp.jpg",
"secondary_image": "products/SSC-organic-generic-packet-com_9f251955-20ef-4ca4-a1d2-66911c9fa102.jpg",
"price": 359,
"handle": "squash-summer-crookneck-organic-seeds",
"title": "Squash Seeds - Summer - Crookneck (Organic)",
"url": "/products/squash-summer-crookneck-organic-seeds",
"available": true
},
{
"featured_image": "files/squash-seeds-summer-zucchini-endurance-bc-f1-comp.jpg",
"secondary_image": "products/MVS-generic-packet_1_a44aa9e2-012c-409c-81ff-8c41c89825e8.jpg",
"price": 399,
"handle": "squash-seeds-summer-zucchini-endurance-bc-f1",
"title": "Squash Seeds - Summer - Zucchini, Endurance BC, F1",
"url": "/products/squash-seeds-summer-zucchini-endurance-bc-f1",
"available": true
},
{
"featured_image": "files/squash-summer-zucchini-golden-seeds-Comp.jpg",
"secondary_image": "products/non-gmo-sprouting-seed_76afde70-f5b8-4d52-9a3f-724eaa273172.jpg",
"price": 299,
"handle": "squash-summer-zucchini-golden-seeds",
"title": "Squash Seeds - Summer - Zucchini Golden",
"url": "/products/squash-summer-zucchini-golden-seeds",
"available": true
},
{
"featured_image": "files/squash-summer-zucchini-golden-glory-hybrid-seed-comp.jpg",
"secondary_image": "products/SeedPouch_c1fa0271-063b-4ea6-9396-ddd928b281b9.jpg",
"price": 439,
"handle": "squash-summer-zucchini-golden-glory-hybrid-seed",
"title": "Squash Seeds - Summer - Golden Glory Hybrid",
"url": "/products/squash-summer-zucchini-golden-glory-hybrid-seed",
"available": true
},
{
"featured_image": "files/cocozelle-zucchini-squash-comp.jpg",
"secondary_image": "products/Seed_Packet_42d39fd9-0bcd-422a-914d-22d268762d44.jpg",
"price": 299,
"handle": "cocozelle-zucchini-squash",
"title": "Squash Seeds - Summer - Cocozelle Zucchini",
"url": "/products/cocozelle-zucchini-squash",
"available": true
},
{
"featured_image": "files/organic-cocozelle-zucchini-squash-comp.jpg",
"secondary_image": "products/non-gmo-seed-bag-com-sm_836e7e3f-e094-47cb-beee-e551e488db01.jpg",
"price": 359,
"handle": "organic-cocozelle-zucchini-squash",
"title": "Zucchini Seeds - Cocozelle - Organic",
"url": "/products/organic-cocozelle-zucchini-squash",
"available": true
},
{
"featured_image": "files/squash-summer-early-white-bush-scallop-seed-wm_700_1222x1222_03374f3c-3a9e-4ac9-8699-99b6e5e32315.jpg",
"secondary_image": "products/non-gmo-sprouting-seed_f6735e51-e904-4365-b469-db83339db1e9.jpg",
"price": 299,
"handle": "squash-summer-early-white-bush-scallop-seeds",
"title": "Squash Seeds - Summer - Early White Bush Scallop",
"url": "/products/squash-summer-early-white-bush-scallop-seeds",
"available": true
},
{
"featured_image": "files/squash-summer-zucchini-eight-ball-hybrid-seeds-comp.jpg",
"secondary_image": "products/SeedPouch_b6a5340d-20cd-4e82-a074-99a4f863f25c.jpg",
"price": 479,
"handle": "squash-summer-zucchini-eight-ball-hybrid-seeds",
"title": "Squash Seeds - Summer - Zucchini Eight Ball Hybrid",
"url": "/products/squash-summer-zucchini-eight-ball-hybrid-seeds",
"available": true
},
{
"featured_image": "files/squash-summer-zucchini-grey-seeds-Comp.jpg",
"secondary_image": "products/Seed_Pouch_1_1c727357-2ff3-4dc3-816d-67afaebe792c.jpg",
"price": 299,
"handle": "squash-summer-zucchini-grey-seeds",
"title": "Squash Seeds - Summer - Zucchini Grey",
"url": "/products/squash-summer-zucchini-grey-seeds",
"available": true
},
{
"featured_image": "files/organic-early-prolific-straightneck-squash-comp.jpg",
"secondary_image": "products/SSC-organic-generic-packet-com_d69953eb-24c7-4d9a-9d0f-a3399e9dbad5.jpg",
"price": 359,
"handle": "organic-early-prolific-straightneck-squash",
"title": "Squash Seeds - Summer - Early Prolific Straightneck (Organic)",
"url": "/products/organic-early-prolific-straightneck-squash",
"available": true
},
{
"featured_image": "files/organic-dark-green-zucchini-squash-Comp.jpg",
"secondary_image": "",
"price": 339,
"handle": "organic-dark-green-zucchini-squash",
"title": "Squash - Summer - Dark Green Zucchini (Organic)",
"url": "/products/organic-dark-green-zucchini-squash",
"available": true
},
{
"featured_image": "files/squash-summer-sunburst-hybrid-seeds-Comp.jpg",
"secondary_image": "products/SeedPouch_f4fed514-d0b3-4706-8b48-1e808f93761e.jpg",
"price": 479,
"handle": "squash-summer-sunburst-hybrid-seeds",
"title": "Squash Seeds - Summer - Sunburst Hybrid",
"url": "/products/squash-summer-sunburst-hybrid-seeds",
"available": true
},
{
"featured_image": "products/sqaush-summer-fordhook-zuchinni-conventional-l-com-wm.jpg",
"secondary_image": "products/MVS-generic-packet-com_a3690b8e-108a-4e8d-b521-7a708e315f89.jpg",
"price": 199,
"handle": "squash-seeds-summer-fordhook-zucchini",
"title": "Squash Seeds - Summer - Fordhook Zucchini",
"url": "/products/squash-seeds-summer-fordhook-zucchini",
"available": true
},
{
"featured_image": "files/zucchini-elite-hybrid-plant-seed-wm_700_1222x1222_0795b76d-0ca9-4e8c-a859-2c92884f2355.jpg",
"secondary_image": "products/SeedPouch_78667d94-8ff9-4096-ae0a-ee67206388b8.jpg",
"price": 479,
"handle": "squash-summer-zucchini-elite-hybrid-seeds",
"title": "Squash Seeds - Summer - Zucchini Elite Hybrid",
"url": "/products/squash-summer-zucchini-elite-hybrid-seeds",
"available": true
},
{
"featured_image": "files/heirloom-vegetable-seeds-pe-t-squash-heirloom-seeds-summer-squash-seeds-caserta-zucchini-seeds-Comp.jpg",
"secondary_image": "products/Seed_Packet_fda37c28-70d5-4663-9b5e-193d6dfb3d3e.jpg",
"price": 299,
"handle": "heirloom-vegetable-seeds-pe-t-squash-heirloom-seeds-summer-squash-seeds-caserta-zucchini-seeds",
"title": "Zucchini Seeds - Caserta",
"url": "/products/heirloom-vegetable-seeds-pe-t-squash-heirloom-seeds-summer-squash-seeds-caserta-zucchini-seeds",
"available": true
},
{
"featured_image": "files/costata-romanesco-squash-Comp.jpg",
"secondary_image": "products/Seed_Packet_335f0c5d-e9e2-4018-bb3c-c8d58bc8db6c.jpg",
"price": 359,
"handle": "costata-romanesco-squash",
"title": "Squash Seeds - Costata Romanesco Zucchini",
"url": "/products/costata-romanesco-squash",
"available": true
},
{
"featured_image": "files/squash-seeds-korean-summer-king-ka-ae-hybrid-Comp.jpg",
"secondary_image": "products/non-gmo-seed-bag-premium_a035fd7b-a26c-4524-acdb-27f4592634e5.png",
"price": 399,
"handle": "squash-seeds-korean-summer-king-ka-ae-hybrid",
"title": "Squash Seeds - Korean, Summer - King Ka Ae - Hybrid",
"url": "/products/squash-seeds-korean-summer-king-ka-ae-hybrid",
"available": true
},
{
"featured_image": "files/organic-scallop-yellow-bush-squash-seed-Comp.jpg",
"secondary_image": "products/non-gmo-seed-bag-4-oz-sm_cc6f6823-068a-4ba9-8950-404512e52765.png",
"price": 359,
"handle": "organic-scallop-yellow-bush-squash-seed",
"title": "Squash Seeds - Summer - Scallop Yellow Bush (Organic)",
"url": "/products/organic-scallop-yellow-bush-squash-seed",
"available": true
},
{
"featured_image": "files/scallop-yellow-bush-squash-Comp.jpg",
"secondary_image": "products/Seed_Packet_2a5e73bf-0e4b-4fad-876a-5772902df93a.jpg",
"price": 199,
"handle": "scallop-yellow-bush-squash",
"title": "Squash Seeds - Summer - Scallop Yellow Bush",
"url": "/products/scallop-yellow-bush-squash",
"available": true
},
{
"featured_image": "files/summer-squash-bennings-green-tint-scallop-seeds-Comp.jpg",
"secondary_image": "products/non-gmo-sprouting-seed_c6df91aa-359e-4a56-b137-e9f79c6a5b31.jpg",
"price": 199,
"handle": "summer-squash-bennings-green-tint-scallop-seeds",
"title": "Squash Seeds - Summer - Bennings Green Tint Scallop",
"url": "/products/summer-squash-bennings-green-tint-scallop-seeds",
"available": true
},
{
"featured_image": "files/squash-seeds-summer-garden-spineless-f1-Comp.jpg",
"secondary_image": "products/MVS-generic-packet-com_37968032-c153-4101-8b3e-68250d0ed05c.jpg",
"price": 199,
"handle": "squash-seeds-summer-garden-spineless-f1",
"title": "Squash Seeds - Summer - Garden Spineless Zucchini Hybrid",
"url": "/products/squash-seeds-summer-garden-spineless-f1",
"available": true
},
{
"featured_image": "files/heirloom-vegetable-seeds-pe-t-squash-heirloom-seeds-summer-squash-seeds-round-zucchini-seeds-Comp.jpg",
"secondary_image": "products/Seed_Packet_44b5f69e-54ba-4d0d-82a8-7e86947606d8.jpg",
"price": 299,
"handle": "heirloom-vegetable-seeds-pe-t-squash-heirloom-seeds-summer-squash-seeds-round-zucchini-seeds",
"title": "Zucchini Seeds - Round",
"url": "/products/heirloom-vegetable-seeds-pe-t-squash-heirloom-seeds-summer-squash-seeds-round-zucchini-seeds",
"available": true
},
{
"featured_image": "files/squash-summer-zucchini-greyzinni-hybrid-seeds-comp.jpg",
"secondary_image": "products/SeedPouch_dd62860d-fd0c-432c-8c52-19e4e30da138.jpg",
"price": 399,
"handle": "squash-summer-zucchini-greyzinni-hybrid-seeds",
"title": "Squash Seeds - Summer - Zucchini Greyzinni Hybrid",
"url": "/products/squash-summer-zucchini-greyzinni-hybrid-seeds",
"available": true
},
{
"featured_image": "files/squash-summer-zucchini-italian-striped-seeds-Comp.jpg",
"secondary_image": "products/non-gmo-sprouting-seed_42c27da8-10df-4346-b2a4-0c79bc4e2703.jpg",
"price": 299,
"handle": "squash-summer-zucchini-italian-striped-seeds",
"title": "Squash Seeds - Summer - Zucchini Italian Striped",
"url": "/products/squash-summer-zucchini-italian-striped-seeds",
"available": true
},
{
"featured_image": "files/squash-seeds-summer-fordhook-organic-Comp.jpg",
"secondary_image": "products/SSC-organic-generic-packet-com_dbdcd181-f467-4454-9c8a-366d75cbcd23.jpg",
"price": 359,
"handle": "squash-seeds-summer-fordhook-organic",
"title": "Squash Seeds - Summer - Fordhook Zucchini (Organic)",
"url": "/products/squash-seeds-summer-fordhook-organic",
"available": true
},
{
"featured_image": "files/squash-seeds-summer-vegetable-marrow-white-bush-Comp.jpg",
"secondary_image": "products/Seed_Packet_06d194d9-3401-431f-a6d6-bab5a3ddbf62.jpg",
"price": 299,
"handle": "squash-seeds-summer-vegetable-marrow-white-bush",
"title": "Squash Seeds - Summer - Vegetable Marrow White Bush",
"url": "/products/squash-seeds-summer-vegetable-marrow-white-bush",
"available": true
},
{
"featured_image": "files/Teot-Bat-Put-Korean-Summer-Squash-Hybrid-Comp.jpg",
"secondary_image": "",
"price": 399,
"handle": "squash-seeds-korean-summer-teot-bat-put-hybrid",
"title": "Squash Seeds - Korean, Summer - Teot Bat Put - Hybrid",
"url": "/products/squash-seeds-korean-summer-teot-bat-put-hybrid",
"available": true
}
]
