Short Day Onion Seeds – Non-GMO Heirloom

Grow full, sweet bulbs in the warm South with short day onion seeds, the type that starts forming onions while daylight is still short, around 10 to 12 hours. This collection features mild, early varieties like the pink-purple Violet de Galmi and the sweet Early White Grano, both non-GMO heirloom onion seed that sprouts readily and matures fast in southern gardens. Short day onions are the right choice below roughly the 36th parallel, where long day types would never bulb properly. Sow them in fall or late winter for one of the first big harvests of the season. Browse our short day onion seeds for sale below, then follow the growing guide to take your crop from seed to harvest.

What we love about growing short day onions

  • Bred to bulb in the short days and mild winters of the South
  • Sweet, mild flavor that is gentle enough for fresh eating
  • Mature early for one of the first big harvests of the year
  • Violet de Galmi brings striking pink-purple color to the plot
  • Open-pollinated heirlooms you can save and resow every year
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Individual Packets

  • Violet de Galmi Onion Seeds – Non-GMO Heirloom

    Violet de Galmi Onion Seeds – Non-GMO Heirloom

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    $4.99

    Sale Price

    $4.99

  • Early White Grano Onion Seeds – Non-GMO Heirloom

    Early White Grano Onion Seeds – Non-GMO Heirloom

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    Price

    $4.99

    Sale Price

    $4.99

Grow full, sweet bulbs in the warm South with short day onion seeds, the type that starts forming onions while daylight is still short, around 10 to 12 hours. This collection features mild, early varieties like the pink-purple Violet de Galmi and the sweet Early White Grano, both non-GMO heirloom onion seed that sprouts readily and matures fast in southern gardens. Short day onions are the right choice below roughly the 36th parallel, where long day types would never bulb properly. Sow them in fall or late winter for one of the first big harvests of the season. Browse our short day onion seeds for sale below, then follow the growing guide to take your crop from seed to harvest.

What we love about growing short day onions

  • Bred to bulb in the short days and mild winters of the South
  • Sweet, mild flavor that is gentle enough for fresh eating
  • Mature early for one of the first big harvests of the year
  • Violet de Galmi brings striking pink-purple color to the plot
  • Open-pollinated heirlooms you can save and resow every year

The sweet, early onions for southern gardens

Short day onions are the bulbing onions of the warm South, the ones that start forming bulbs while the days are still short. The two varieties here are prized at home and abroad: Violet de Galmi, a beautiful pink-purple West African heirloom with sweet, mild flesh, and Early White Grano, a tender, sweet white onion and a parent of the famous Vidalia type. Grown where winters are mild, they mature early and slice sweet.

How to grow short day onions from seed

Short day onions are timed to your winter. In the South, sow the seed in fall, or start it indoors in late fall for transplanting in winter, giving plants full sun, loose fertile soil, and steady moisture. They begin bulbing once daylight reaches about 10 to 12 hours, so they are grown below roughly the 36th parallel, where long day onions would stay small. For the full step-by-step, see our Early White Grano growing guide for depth, spacing, and harvest timing.

How to use short day onions

Short day onions are sweet, mild, fresh-eating onions. Slice Violet de Galmi and Early White Grano raw into salads and salsas, grill them, or cook them down soft and sweet in almost any savory dish. Sweet onions like these carry more water than pungent storage types, so they are best enjoyed within a few weeks to a couple of months of harvest rather than stored long term.

Short day onions and their allium cousins

Match the onion to your latitude and keep the allium patch full. Browse the full Onion Seeds collection for bunching onions, reds, and scallions, or switch to Long Day Onion Seeds if you garden in the northern half of the country. Explore the whole range in our Vegetable Seeds collection.

Why buy short day onion seeds from Organo Republic

Every packet of onion seed we sell is non-GMO, open-pollinated heirloom, and germination tested, so you can sow with confidence. As a U.S.-based licensed seed dealer, we work directly with trusted growers to keep quality high and prices low, and every pack carries a QR code that links straight to free online growing guidance. Orders over $49 ship free. Whether you want a single pack of sweet onions or a full southern garden, you will find dependable, easy-to-grow seed here.

Short day onion seeds: frequently asked questions

Short day onions begin forming bulbs when daylight reaches about 10 to 12 hours. That makes them the right type for the southern United States, roughly below the 36th parallel, where they are usually planted in fall or winter for an early crop.
They will grow leaves, but they bulb too early to reach full size in the North, so northern gardeners get better results from long day types. Short day onions are best where winters are mild and days stay relatively short through the growing season.
Yes, the varieties here are known for sweet, mild flavor. Sweet onions carry more water and sugar and less pungency than storage onions, which makes them excellent fresh but shorter keeping.
In the South, sow in fall or late winter, or start seed indoors in late fall and transplant while the weather is still cool. The plants grow through the mild winter and bulb up as the days begin to lengthen.
Yes. Both varieties are non-GMO, open-pollinated heirlooms, so you can save seed from your best bulbs and grow them again next year.

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