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.
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![Legend: H for Heirloom, O for Organic, A for AAS Winner, F for staff favorites]()
Squash Seeds - Winter - Cushaw White
80-120 Days to maturity. Cucurbita argyrosperma. Cushaw White Squash Seeds. Non-GMO, Cushaw White Winter Squash Seeds. Non-GMO, annual, open-pollinated, heirloom. Suitable for growing in fields, containers, garden plots, raised beds,...
Squash Seeds - Winter - Pilgrim F1
Pilgrim F1 Hybrid Squash Seeds. Cucurbita moschata. F1 Hybrid. Non-GMO. Annual. 80 days to maturity. This hybrid butternut squash performs well under a wide variety of growing conditions and has...
Squash Seeds - Winter - Hubbard White
90 days to maturity. Cucurbita maxima. Hubbard White Winter Squash Seeds.Non-GMO, annual, heirloom, open-pollinated. Suitable for growing in fields, garden plots, and raised beds. Classic white-skinned Hubbard with thick, bumpy...
Squash Seeds - Winter - American Tondo
100 days to maturity. Cucurbita pepo. American Tondo Winter Squash Seeds. Non-GMO, annual, heirloom, open-pollinated. This is suitable for growing in fields, containers, garden plots, raised beds, and greenhouses. Italian...
Squash Seeds - Winter - Triamble
105 days to maturity. Cucurbita maxima. Triamble Winter Squash Seeds. Non-GMO, annual, heirloom, open-pollinated. Suitable for growing in fields, garden plots, and raised beds. An unusually beautiful Australian heirloom with...
Squash Seeds - Winter - Table Princess F1 PMT
Table Princess F1 PMT Hybrid Squash Seeds. Cucurbita pepo. F1 Hybrid. Non-GMO. Annual. 70 days to maturity. Table Princess F1 has a semi-bush habit, making it possible to plant in...
Squash Seeds - Winter - Gold Nugget - Organic
Organic Gold Nugget Winter Squash Seeds. 75 - 95 days to maturity. Can be grown in containers. Cucurbita maxima. Heirloom, Non-GMO, Annual. Early compact runnerless plant with a Buttercup shape....
Gourd Seeds - Small Warted Mix
60+ Days to maturity. Cucurbita sp. Small Warted Mixed Gourd Vegetable Seeds. Non-GMO, annual, open-pollinated gourd seeds. A collection of different shapes and colors of ornamentals gourds, mostly under 1...
Squash Seeds - Winter - Pinata F1 PMT
Pinata F1 PMT Hybrid Squash Seeds. Cucurbita pepo. F1 Hybrid. Non-GMO. Annual. 85 days to maturity. This winter squash will truly become a fast favorite in your house. Pinata F1...
Squash Seeds - Winter - Guatemalan Blue
90 to 110 days to maturity. Cucurbita maxima. Guatemalan Blue Winter Squash Seeds. Non-GMO, annual, heirloom, open-pollinated. Suitable for growing in fields, garden plots, raised beds, and containers. Striking blue-skinned...
Squash Seeds - Winter - Amish Pie (Organic)
100 days to maturity. Cucurbita maxima. Organic Amish Pie Winter Squash Seeds. Non-GMO, annual, heirloom, organic, open-pollinated. This is suitable for growing in fields, containers, garden plots, raised beds, and...
Squash Seeds - Winter - Cushaw Orange Striped
Cushaw Orange Striped Winter Squash Seeds. 110 days to maturity. Cucurbita mixta. Annual. Heirloom. The cushaw varieties are commonly referred to as both squash and pumpkins. Approximately 175 seeds/ounce. Squash...
Squash Seeds - Winter - Bugle
80 Days to maturity. Cucurbita maxima. Bugle Winter Squash Seeds. Non-GMO, open-pollinated, heirloom. Suitable for growing in fields, garden plots, and raised beds. This French heirloom produces a beautifully shaped...
Squash Seeds - Winter - Chieftain Hybrid
80 days to maturity. Cucurbita moschata. Chieftain Hybrid Winter Squash Seeds. Non-GMO, annual, F1 hybrid. This is suitable for growing in fields, containers, garden plots, raised beds, and greenhouses. Early...
Squash Seeds - Winter - Fordhook Acorn (Organic)
80-120 Days to maturity. Cucurbita pepo. Fordhook Acorn (Organic) Winter Squash Seeds. Non-GMO, annual, organic, open-pollinated heirloom. Suitable for growing in fields, garden plots, raised beds, and greenhouses. Resistant to...
Squash Seeds - Winter - Burgess Buttercup (Organic)
95 days to maturity. Cucurbita maxima. Organic Burgess Buttercup Winter Squash Seeds. Non-GMO, annual, heirloom, open-pollinated. This is suitable for growing in fields, garden plots, and raised beds. Classic buttercup...
Squash Seeds - Winter - Indian Brave F1
Indian Brave F1 Hybrid Squash Seeds. Cucurbita moschata. F1 Hybrid. Non-GMO. Annual. 85 days to maturity. Many of our customers have been requesting a larger vining hybrid butternut that is...
Pumpkin Seeds - Autumn Moon and Ghoulie Mix
80-90 Days to maturity. Cucurbita pepo. Autumn Moon & Ghoulie Mixed Pumpkin Vegetable Seeds. Non-GMO, annual, hybrid pie pumpkins. This perfect mix combines seeds for Autumn Moon F1 and Ghoulie...
Squash Seeds - Winter - Hubbard Essex Red
110 Days to maturity. Cucurbita maxima. Hubbard Essex Red Winter Squash Seeds. Non-GMO, annual, open-pollinated, heirloom. Suitable for growing in fields, containers, garden plots, raised beds, and greenhouses. Hubbard Essex...
Squash Seeds - Winter - Triamble (Organic)
105 days to maturity. Cucurbita maxima. Organic Triamble Winter Squash Seeds. Non-GMO, annual, organic, heirloom, open-pollinated. Suitable for growing in fields, garden plots, and raised beds. An unusually beautiful Australian...
Squash Seeds - Winter - Sugaretti F1 AAS
Sugaretti F1 AAS Hybrid Squash Seeds. Cucurbita pepo. F1 Hybrid. Non-GMO. Annual. 90 days to maturity from seed. 2017 AAS Regional Winner. Winter Squash Sugaretti F1 prolifically produces a generous...
Squash Seeds - Winter - Hubbard Anna Swartz
Hubbard Anna Swartz Winter Squash Seeds. 90 - 100 days to maturity. Cucurbita maxima. Annual. Heirloom. A family heirloom was given to Anna Swartz by a friend in the 1950's....
Squash Seeds - Winter - Zao Feng Hybrid
95-105 Days to maturity. Cucurbita maxima x Cucurbita moschata. Zao Feng Hybrid Squash Seeds. Non-GMO, annual, F1 hybrid. Suitable for growing in fields, containers, garden plots, raised beds, and greenhouses....
Squash Seeds - Winter - Moore Gold
100 Days to maturity. Cucurbita maxima. Moore Gold Winter Squash Seeds. Non-GMO, annual, open-pollinated, heirloom. Suitable for growing in fields, containers, garden plots, raised beds, and greenhouses. Resistant to common...
Squash Seeds - Winter - New Zealand Blue
110 Days to maturity. Cucurbita maxima. New Zealand Blue Winter Squash Seeds. Non-GMO, annual, open-pollinated, heirloom. Suitable for growing in fields, containers, garden plots, raised beds, and greenhouses. New Zealand...
Squash Seeds - Winter - Blue Banana
80-120 Days to maturity. Cucurbita maxima. Winter Blue Banana Squash Seeds. Non-GMO, annual, open-pollinated. A rare heirloom winter squash, Blue Banana produces large, elongated fruits averaging 18–24 inches long and...
Squash Seeds - Winter - Big Chief Hybrid
110 days to maturity. Cucurbita moschata. Big Chief Hybrid Butternut Winter Squash Seeds. Non-GMO, annual, F1 hybrid. This is suitable for growing in fields, garden plots, raised beds, and containers....
Pumpkin Seeds - Baby Boo
95 Days to maturity. Cucurbita pepo. Baby Boo Pumpkin Vegetable Seeds. Non-GMO, annual, open-pollinated mini pumpkin squash seeds. These pumpkins are small and white. They will look perfect on the...
Squash Seeds - Winter - Strawberry Crown
Strawberry Crown Winter Squash Seeds. 110 days to maturity. Cucurbita maxima. Heirloom, Annual. Originated from Brazil. Strawberry Crown is a beautiful winter squash with excellent color and delicious qualities. About...
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