{"product_id":"walla-walla-sweet-heirloom-onion-seeds","title":"Walla Walla Sweet Heirloom Onion Seeds","description":"\u003cp\u003e\u003cstrong\u003eWalla Walla Sweet Onion\u003c\/strong\u003e is famous for its enormous, mild bulbs and unusually sweet flavor, a garden treasure for fresh slicing, grilling, and summer cooking. The pale golden onions mature into impressive round bulbs with crisp white flesh and far less bite than ordinary storage onions. This open-pollinated, non-GMO heirloom is a standout choice for gardeners who want an onion worth showing off.\u003c\/p\u003e\u003ch2\u003eHistory\u003c\/h2\u003e\u003cp\u003eWalla Walla Sweet Onion was developed in the Walla Walla Valley of Washington, where the region's fertile soil, cool nights, and long summer days helped shape its reputation. The variety is connected to Corsican onion seed brought to the valley in the late 1800s and refined through generations of local growing. Its mild, sweet flavor became so distinctive that Walla Walla onions earned a protected regional identity and a loyal following far beyond the Pacific Northwest.\u003c\/p\u003e\u003ch2\u003ePlant Profile\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDays to Maturity:\u003c\/strong\u003e 90–120 days, depending on growing method\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBulb Size:\u003c\/strong\u003e Large rounded bulbs, commonly 3–4 inches across\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlant Size:\u003c\/strong\u003e 18–24 inch upright blue-green leaves\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlant Type:\u003c\/strong\u003e Long-day annual bulb onion\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFlavor Profile\u003c\/h2\u003e\u003cp\u003eWalla Walla Sweet Onions are crisp, juicy, and naturally mild with a gentle sweetness that makes them especially good raw. Their clean white flesh softens beautifully when grilled, roasted, or caramelized without becoming aggressively sharp.\u003c\/p\u003e\u003ch2\u003eWhen to Plant\u003c\/h2\u003e\u003cp\u003eStart seeds indoors 10–12 weeks before your last expected frost, or direct sow as soon as the soil can be worked in spring. Transplant seedlings when they are about pencil-thick and give bulbs a long, sunny season to size up. Walla Walla is a long-day onion, so it performs best where summer days provide plenty of daylight. Check your \u003ca href=\"https:\/\/planthardiness.ars.usda.gov\" target=\"_blank\" rel=\"noopener nofollow\"\u003eUSDA Plant Hardiness Zone Map\u003c\/a\u003e for local timing.\u003c\/p\u003e\u003ch2\u003eGrowing Tips \u0026amp; Planting Dimensions\u003c\/h2\u003e\u003cp\u003eSow seeds 1\/4 inch deep in fine, well-drained mix and transplant or thin seedlings 4–6 inches apart for large bulbs. Grow in full sun with loose, fertile soil and steady moisture. Keep weeds down because onions compete poorly, and stop watering as the tops begin to fall and bulbs approach maturity.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eWater at soil level to keep leaves dry and reduce disease pressure.\u003c\/li\u003e\n\u003cli\u003eRotate alliums to a new bed when possible to support healthy soil.\u003c\/li\u003e\n\u003cli\u003eMulch lightly after the soil warms, keeping mulch away from the bulb necks.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003e🌱 Gentle Cover Germination 🌱\u003c\/h2\u003e\u003cp\u003e\u003cem\u003eInto the surface — thin cover only, no light needed\u003c\/em\u003e\u003c\/p\u003e\u003cp\u003eWalla Walla Onion seeds are small, but they grow into strong plants when given steady moisture and a little patience. A fine mix and a light cover help these slow-starting seedlings emerge evenly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow to Germinate Successfully:\u003c\/strong\u003e\u003c\/p\u003e\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eStart with the right foundation.\u003c\/strong\u003e Use a fine seed-starting mix — not garden soil or coarse potting mix. Sift it if needed. Small seeds need a smooth, even surface to make good contact and germinate reliably.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCover lightly — just barely.\u003c\/strong\u003e Press seeds onto the moist surface and cover with no more than 1\/8 inch of finely sifted mix. These seeds do not need light to germinate but they do not want to be buried either.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMist, do not drench.\u003c\/strong\u003e Use a spray bottle to keep the surface evenly moist. Watering from above can wash small seeds away before they ever get started.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarmth is your friend.\u003c\/strong\u003e These seeds germinate best at 65–75°F. A heat mat can help if your growing space runs cool.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrap the humidity.\u003c\/strong\u003e Cover your tray with a humidity dome or a loose piece of plastic wrap. This keeps moisture and warmth stable while you wait.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGive them time.\u003c\/strong\u003e Keep conditions consistent and expect sprouts in about 7–14 days. Onion seedlings are fine and slow-growing at first, so do not give up early.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThin with scissors, not fingers.\u003c\/strong\u003e Once seedlings appear, snip extras at the soil line rather than pulling. This protects the roots of the seedlings you are keeping.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch2\u003eGrowth Type \u0026amp; Harvest Yields\u003c\/h2\u003e\u003cp\u003eWalla Walla forms a single large bulb below the soil with upright leaves above ground. Given full sun, rich loose soil, and a long growing season, each plant can produce one impressive onion. The bulbs are best enjoyed fresh because their high moisture content makes them less suited to very long storage.\u003c\/p\u003e\u003ch2\u003eKnowing When to Harvest\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eHarvest green onions early, or wait until bulbs have rounded up and the tops begin to soften and fall.\u003c\/li\u003e\n\u003cli\u003eLook for firm bulbs with papery pale-golden skin and a narrowing neck.\u003c\/li\u003e\n\u003cli\u003eLift bulbs gently with a garden fork rather than pulling hard on the leaves.\u003c\/li\u003e\n\u003cli\u003eLet freshly harvested onions cure in a warm, dry, airy place for a short period before storing.\u003c\/li\u003e\n\u003cli\u003eStore Walla Walla onions in a cool, dry, well-ventilated spot and use them ahead of hard storage varieties.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompanion Plants \u0026amp; Mutual Benefits\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCarrots\u003c\/strong\u003e — onions and carrots make efficient use of the same bed and may help confuse each other's pests.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLettuce\u003c\/strong\u003e — fills space between young onions while bulbs are still developing below ground.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBeets\u003c\/strong\u003e — share the cool-to-mild growing season and use a different root shape.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChamomile\u003c\/strong\u003e — attracts beneficial insects near the allium bed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSummer Savory\u003c\/strong\u003e — is a traditional garden pairing that makes good use of sunny bed edges.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow to Enjoy\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSlice raw into sandwiches, burgers, salads, and salsa.\u003c\/li\u003e\n\u003cli\u003eGrill thick rounds until caramelized at the edges.\u003c\/li\u003e\n\u003cli\u003eRoast whole or halved bulbs alongside summer vegetables.\u003c\/li\u003e\n\u003cli\u003eMake sweet onion relish, pickles, or a fresh onion jam.\u003c\/li\u003e\n\u003cli\u003eUse the green tops like mild scallions while bulbs are developing.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eOrder Today\u003c\/h2\u003e\u003cp\u003eGrow the famous sweetness of Walla Walla in your own garden with Walla Walla Sweet Heirloom Onion Seeds. Give these bulbs sun, room, and time, then enjoy a harvest made for fresh summer meals.\u003c\/p\u003e","brand":"Garden Heirloom Seeds","offers":[{"title":"Starter Pack of 15 seeds","offer_id":54049807860026,"sku":"WALLA-WALLA-ONION-STARTER-1","price":0.99,"currency_code":"USD","in_stock":true},{"title":"Garden Pack of 50 seeds - 🌱 Best Value","offer_id":54049807892794,"sku":"WALLA-WALLA-ONION-STARTER-2","price":2.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1003\/7850\/9626\/files\/walla-walla-sweet-onions-in-a-wicker-basket-on-a-garden-table.png?v=1789266194","url":"https:\/\/gardenheirloomseeds.com\/products\/walla-walla-sweet-heirloom-onion-seeds","provider":"Garden Heirloom Seeds","version":"1.0","type":"link"}