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Onion Seeds

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Organic
$2.39
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Peaceful Valley Fulfilled by Seedtime
Out of stock

Evergreen Bunching Onion is the original scallion — a clump-forming, non-bulbing variety producing tall, slender, dark-green stalks with a mild, fr...

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Organic Heir/OP
$2.61
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High Mowing Fulfilled by Seedtime
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A reliable, vigorous bunching onion producing upright, uniform, dark green tops with slender white shanks and a mild, fresh onion flavor perfect fo...

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Organic
$2.39
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Peaceful Valley Fulfilled by Seedtime
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Walla Walla is one of America's most celebrated sweet onions — a short-day heirloom from Washington State that produces enormous, round, mild bulbs...

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Organic
$2.61
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High Mowing Fulfilled by Seedtime
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A high-yielding F1 long-day red storage onion delivering large, globe-shaped bulbs with deep burgundy-red skin and firm, mildly pungent flesh that ...

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Organic
$2.61
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High Mowing Fulfilled by Seedtime
Out of stock

A high-yielding F1 long-day white onion with mild, sweet flavor and outstanding storage potential. Thick, globe-shaped bulbs develop clean white sk...

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Organic
$2.39
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Peaceful Valley Fulfilled by Seedtime
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Cortland is a mild, sweet yellow onion with golden-tan skin and crisp, white flesh that delivers clean, mellow flavor raw or cooked. Its juicy laye...

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Heir/OP
$1.20
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MIgardener Fulfilled by Seedtime
Out of stock

Walla Walla Onion is named for the Washington State valley where it was perfected, and it has earned a devoted following for the exceptional sweetn...

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Organic Heir/OP
$2.61
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High Mowing Fulfilled by Seedtime
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A legendary exhibition onion renowned for producing impressively large, globe-shaped bulbs with golden skin and exceptionally mild, sweet flesh. A ...

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Heir/OP
$1.20
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MIgardener Fulfilled by Seedtime
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Nebuka Evergreen Bunching Onion is an essential ingredient in Japanese and Chinese cooking, prized for producing long, slender, brilliantly white s...

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Organic Heir/OP
$2.61
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High Mowing Fulfilled by Seedtime
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A beautiful, flat Italian cipollini-type onion with deep burgundy-red skin and sweet, mild flesh that caramelizes magnificently. Small, disk-shaped...

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Organic Heir/OP
$2.43
40% Off
Southern Exposure Fulfilled by Seedtime
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This intermediate to long day Italian heirloom onion features sweet white flesh wrapped in vibrant red-purple skins. The flattened, barrel-shaped b...

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$2.43
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Heir/OP
$1.20
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MIgardener Fulfilled by Seedtime
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Red Burgundy Onion is a short-day Southern heirloom with a deep reddish-purple color, flat profile, and a flavor that's slightly spicier than milde...

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Heir/OP
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MIgardener Fulfilled by Seedtime
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Red Geneva Onion is a red cipollini-type heirloom cultivated in Italy since the 1800s and prized for its exceptional braiding quality and extended ...

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Heir/OP
$1.20
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MIgardener Fulfilled by Seedtime
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Texas Early Grano 502 Onion is a classic short-day Vidalia-type heirloom with a globe-shaped profile, white flesh, brown skin, and a naturally swee...

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Organic
$2.61
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High Mowing Fulfilled by Seedtime
Out of stock

A dependable F1 white storage onion with exceptional keeping quality and a mild, sweet flavor that only improves in the cellar. Globe-shaped bulbs ...

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Heir/OP
$1.20
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MIgardener Fulfilled by Seedtime
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Utah Yellow Sweet Spanish Onion produces impressively large, globe-shaped bulbs weighing up to a pound or more with a mild, genuinely sweet flavor ...

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Heir/OP
$1.20
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MIgardener Fulfilled by Seedtime
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Tokyo Long White Bunching Onion is a space-efficient and easy-to-grow variety with long, tender, flavorful white stalks topped with brilliant green...

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Heir/OP
$1.20
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MIgardener Fulfilled by Seedtime
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Red Beard Bunching Onion is an unusual and beautiful Chinese heirloom cultivated from a wild bunching variety, with striking red stalks, tender lea...

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Heir/OP
$1.20
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MIgardener Fulfilled by Seedtime
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Originating in Scotland, Ailsa Craig is a legendary exhibition onion renowned for producing some of the largest, sweetest bulbs in the garden — oft...

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Heir/OP
$1.20
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MIgardener Fulfilled by Seedtime
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Cipollini Onion is the beloved flat, disc-shaped Italian onion with a spicy, nutty aroma and a natural sweetness that caramelizes magnificently in ...

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Heir/OP
$1.20
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MIgardener Fulfilled by Seedtime
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Red Wethersfield Onion put Wethersfield, Connecticut on the map in 1834 as the main export of the entire region — a historical distinction earned e...

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Heir/OP
$1.20
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MIgardener Fulfilled by Seedtime
Out of stock

Crystal White Wax is a classic Southern heirloom pickling onion with small, perfectly round white bulbs, a mild and juicy flavor, and a sweetness t...

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Heir/OP
$1.20
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MIgardener Fulfilled by Seedtime
Out of stock

Southport White Globe Onion is a versatile and mild-flavored long-day heirloom that produces 2-inch, uniformly round white bulbs with a sweet, cris...

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Heir/OP
$1.20
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MIgardener Fulfilled by Seedtime
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Red Long of Tropea Onion is a celebrated Italian specialty variety from the town of Tropea in Calabria — the elongated, cylindrical red bulbs have ...

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Heir/OP
$1.20
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MIgardener Fulfilled by Seedtime
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Pompeii Onion is a uniquely versatile pearl onion cultivated from a short-day variety to grow successfully in long-day zones — producing uniformly ...

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MIgardener Fulfilled by Seedtime
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Days to Maturity: 50Seed Count: 150Bunching- This variety is a cross between a bunching onion and a bulbing onion. This will be the earliest bunchi...

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Heir/OP
$1.20
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MIgardener Fulfilled by Seedtime
Out of stock

Zebrune Shallot is a long-day French heirloom with elongated, distinctive form and a sublime flavor that sits between sweet onion and garlic — mild...

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Organic Heir/OP
$2.43
40% Off
Southern Exposure Fulfilled by Seedtime
Out of stock

Texas Early Grano is a Vidalia-type onion and a good choice for the Mid-Atlantic and the South, best started in fall or winter and transplanted in ...

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$2.43
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Organic Heir/OP
$2.37
40% Off
Southern Exposure Fulfilled by Seedtime
Out of stock

Tokyo Long White is a Japanese heirloom bunching onion producing slim white shafts with upright blue-green tops that quickly grow up to 12 inches a...

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$2.37
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Organic
$2.37
40% Off
Southern Exposure Fulfilled by Seedtime
Out of stock

Evergreen Hardy White is a highly freeze-resistant bunching onion that can be left in the ground year-round, with resistance to thrips, smut, and p...

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Organic
$2.61
40% Off
High Mowing Fulfilled by Seedtime
Out of stock

A golden-amber long-day storage onion with mild, sweet flavor and outstanding keeping quality through the winter months. Amber produces uniform, gl...

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Organic Heir/OP
$2.61
40% Off
High Mowing Fulfilled by Seedtime
Out of stock

A long-day Italian heirloom onion with deep burgundy skin and layered, rosy-pink flesh prized for its bold, pungent flavor and stunning color. Ross...

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Onion Seeds for Planting: Bulb Onions, Scallions, and Shallots

Growing onions from seed opens up far more varieties than sets or transplants ever will, and it's the most affordable way to fill a bed. Our collection of onion seeds covers sweet Spanish types, reliable storage onions, red and cipollini varieties, and bunching onions for scallions, plus a shallot for gardeners who want something a little different. Both organic and conventional options are available, and each listing notes which is which, so you can filter by organic status, heirloom type, and container-friendliness.

Onion Seed Varieties for Slicing, Storing, and Scallions

For mild, sweet onions, Walla Walla, Utah Yellow Sweet Spanish, and Ailsa Craig are classic choices that shine sliced raw on burgers and salads. If you want onions that keep, Cortland F1 and Calibra F1 are dependable yellow types, and Texas Early Grano is a popular pick for warm-winter regions. Red onion fans can choose from Red Carpet F1, Red Wethersfield, Red Burgundy, Red Geneva, Rossa di Milano, and Red Long of Tropea, an elongated Italian type. Small, flavorful bulbs come from Cipollini, Red Geneva Cipollini, and Crystal White Wax, the last one bred for pickling, while Zebrune is a shallot for cooks who like a delicate flavor. Finally, bunching onions like Evergreen, Parade, Nebuka, Heshiko, Tokyo Long White, Red Beard, and Guardsman give you scallions in a matter of weeks.

Growing Onions from Seed: A Head Start Indoors

Onions grow slowly at first, which is why most gardeners start them early inside. Starting seeds indoors 8 to 12 weeks before transplanting is a good idea, with seedlings emerging in 7 to 14 days at 60 to 85°F. Full-size bulb onions in this collection typically show 91 to 120 days to maturity, so the calendar matters more than it does for quick crops like lettuce. The Seedtime garden planning software takes care of the counting by building a planting calendar around your frost dates, and the layout planner makes it easy to slot onions alongside carrots, lettuce, and other beds they get along with.

Buy Onion Seeds with One Shipping Charge

When you shop onion seeds for sale here, you can add seeds from multiple suppliers to the same order and pay one flat shipping charge, or qualify for free standard shipping on Seedtime-fulfilled orders of $49 or more to the lower 48 states. Paid Seedtime members get 20% off seed packets marked "Fulfilled by Seedtime" and 5% off everything else in the store. You can start planning for free, and if you want unlimited calendars and layouts along with those store discounts, compare Seedtime's plans to find the right fit. Whether you want one packet of onion seeds for planting or a full range of bulbs and scallions, it all ships together.

Frequently Asked Questions

How do I choose between short-day and long-day onions?

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Onions form bulbs in response to day length, so the right variety depends on how far north or south you garden. Short-day onions suit southern latitudes, while intermediate and long-day types are grown at higher latitudes. Planting the wrong type usually gives you lots of leaves and small bulbs, so check your latitude and each variety's notes before you order.

Why did my onions send up flower stalks?

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Onions that flower before forming bulbs have usually been bolted by cold. We advise against planting too early, since a cold snap can trigger flowering, and also against planting too late, when plants won't be big enough to support a good bulb. If a stalk appears, cut it off and use that onion first, since it won't store well.

How do I cure and store onions after harvest?

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Once the tops fall over and start to dry, pull the bulbs and lay them out in a warm, airy spot out of direct sun for a couple of weeks. When the necks are tight and the outer skins are papery, trim the roots and tops, then store the bulbs somewhere cool, dry, and dark. Sweet types like Walla Walla have a shorter storage life, so use those first and save the pungent yellows for later in the season.