If you’ve ever found a forgotten onion sprouting in your pantry, you’ve probably wondered: how to plant an onion that has sprouted and turn it into a productive plant. The good news is that sprouted onions are perfectly viable for planting, and with a little care, they can produce fresh green tops or even new bulbs. This guide covers the basics of planting sprouted onions, along with a selection of products that can support your onion gardening efforts. Whether you’re a beginner or an experienced gardener, you’ll find practical advice here.
In October of 2026, many gardeners are looking for cost-effective ways to expand their gardens. Planting sprouted onions is a great way to reduce food waste and enjoy homegrown flavor. We have gathered 8 products that can help you get started, from onion sets to seeds to ready-to-plant seedlings. Based on user feedback and product descriptions, these options range from $4.94 to $30.00 and include brands like StargazerPerennials, Unknown, KVITER and more.
For more tips on nurturing your plants, check out our guide on best plant food for water propagation 2026 growth secrets — it covers nutrients that also benefit onions when grown in containers.
Pros
- Non-GMO and heirloom variety for pure, traditional flavor.
- Continuous harvest potential reduces the need for replanting.
- Suitable for both indoor and outdoor growing in USDA zones 3-10.
- Large seed count (500+) at an affordable price.
- Positive reviews highlight good germination and growth when planted correctly.
Cons
- Some users report slow or inconsistent germination, which is common for onion seeds.
- Not all seeds may reach harvestable size; proper soil and moisture are crucial.
- A few customers experienced complete failure, possibly due to planting conditions.
TKE Farms & Gardens has packed their Tokyo Long White Bunching Onion Seeds into a single packet that promises a steady supply of fresh, mild onions. With over 500 non-GMO heirloom seeds, this set is aimed at home gardeners who want a reliable, low-cost way to keep green onions on hand. Whether you have a sprawling backyard garden or just a container on a sunny windowsill, these seeds are designed to adapt and deliver.
The standout feature is the cut-and-come-again growth habit. Instead of pulling the whole plant, you snip off the tops and the onions regrow. This means one planting can give you multiple harvests over months. The seeds germinate within 7-14 days and reach full size in 60-75 days, which is on par for bunching onions. The flavor is pleasantly mild and sweet, making them ideal for raw applications like salads and garnishes, as well as cooked dishes like stir-fries and soups.
Growing these onions is straightforward: sow seeds about a quarter-inch deep in well-draining soil, keep them moist, and provide full sun to partial shade. They are hardy in USDA zones 3-10 and can tolerate cooler temperatures, extending the growing season. The included instructions are clear and helpful for beginners. However, the product does require patience: onion seeds are naturally slow to germinate, and some users reported that their seeds either didn't sprout or grew too thin to harvest. Proper soil preparation and consistent watering are essential for success.
On the plus side, the large seed count at this price point is a great value. The seeds come from a veteran-owned small business that stands behind their product. Customer reviews average 4.2 out of 5 stars, with many praising the fast growth and continuous harvest. The main drawbacks are the occasional germination issues and the need for attentive care during the early stages. If you have had trouble with onion seeds before, you might want to start with a small test batch.
Overall, the TKE Farms & Gardens Tokyo Long White Bunching Onion Seeds are a solid choice for gardeners looking to add a perennial-like onion crop to their setup. They offer good flavor, a generous quantity, and the convenience of regrowth. Just be prepared for a moderate learning curve and don't expect every single seed to sprout. With the right conditions, you'll be enjoying fresh green onions straight from your garden for months.
Pros
- Healthy, well-rooted transplants that establish quickly with minimal shock when planted.
- Ideal for gardeners who want a low-effort way to produce fresh scallions without seed starting.
- Excellent for successive harvesting: cut what you need and the plant regrows.
- Works flawlessly in both traditional soil gardens and modern hydroponic systems.
- Customer reviews consistently highlight the robust root systems and overall plant vitality.
Cons
- Higher upfront cost compared to buying a packet of seeds, since you're paying for established plants.
- Only 6 plugs per order, which may be limiting for large-scale planting or heavy users.
- Cold hardiness is limited to zones 6-10; gardeners in colder zones may need to overwinter indoors.
CercaCultivation's Green Onion Seedlings offer a convenient shortcut for home gardeners who crave fresh scallions without the fuss of starting from seed. Each order comes with six live plugs (also called starts or transplants) that are already sprouted and robust. These pre-sprouted onions are especially appealing if you want to skip the delicate early stages of seed germination and get straight to harvesting. Whether you're growing in soil beds, raised containers, or a hydroponic setup, these plugs adapt quickly and minimize transplant shock.
The standout feature here is the plant's ability to provide multiple harvests. You can snip the green tops when they reach about 12-18 inches tall, and the onion will regrow, giving you a steady supply of mild-flavored scallions for soups, salads, or garnishes. The variety is also adaptable to both cool and warm seasons, making it a versatile choice for gardeners in USDA zones 6 through 10. With a days-to-maturity range of 60-70, you'll be enjoying homegrown onions in just a couple of months.
Real-world feedback backs up the quality. Reviewers note the exceptionally healthy root systems and the fact that each plug often contains more than one seedling, effectively giving you extra plants. The product's verified purchasers describe the onions as ready to plant as-is or easily separable for even more coverage. This attention to plant vigor suggests good nursery practices and careful packaging.
On the downside, the price is notably higher than a packet of seeds, though you're paying for time and convenience. If you need a large quantity of scallion plants, six plugs may not be enough for serious stocking up. Also, gardeners in colder zones (below 6) will need to provide winter protection or grow indoors during freezing months. These are honest trade-offs for a product that's more about ease and reliability than budget scaling.
Overall, CercaCultivation's Green Onion Seedlings are a smart buy for home cooks and urban gardeners who want a straightforward, productive addition to their edible garden. The strong starts, forgiving growing requirements, and potential for repeated harvests make this a solid investment in your homegrown produce supply.
Pros
- Sweet flavor that rivals Vidalia onions when grown in the right conditions
- Bolt resistant helps ensure a longer growing window
- Fast green onion harvest in only 30 days
Cons
- Mixed reviews: many plants arrive dried out or rotten
- Shipping delays can compromise plant viability
- Not suitable for long-day northern regions
The 30 Yellow Granex Onion Plants bundle aims to bring the sweetness of famous Vidalia-style onions to your home garden. These short-day onions are known for their mild, non-pungent flavor and thin yellow skin. They're ideal for gardeners in USDA zones 7 and warmer, where they can be planted in early spring for a summer harvest. The plants are marketed as bolt resistant, which means less chance of flowers stunting bulb growth.
In terms of performance, the description promises a 100-day maturity and the ability to harvest green onions in just 30 days. Many customers have reported success with strong growth and good yields. However, a significant number of reviews point to poor condition upon arrival: plants arriving dried out, limp, or completely rotten. The 2.9-star average rating reflects this inconsistency. While some buyers loved their healthy transplants, others found up to 90% of the order unusable.
The build quality of the plants themselves is a gamble. When they arrive fresh, they are vigorous and easy to plant. But the packaging and shipping appear to cause issues, especially if delivery takes longer than expected. The seller offers a 100% guarantee, but getting a replacement may require extra effort. For the price, you're getting 30 bare-root starts, which is competitive, but only if they survive transit.
For potential buyers, the main drawback is the lack of reliability. If you have a garden that relies heavily on these onions, consider ordering early to account for possible replacements, or look for a more consistent nursery source. On the flip side, those who receive healthy plants often rave about the flavor and ease of growth. This is not a product for beginners who need guaranteed results.
Overall, the Yellow Granex onion plants promise excellent taste and good growing traits, but execution falls short due to poor handling and shipping. If you're willing to take a chance and can provide ideal growing conditions, you might be rewarded with a bumper crop of sweet onions. Otherwise, proceed with caution and check recent reviews before ordering.
Pros
- Excellent germination rate as verified by customer testing
- Mild, sweet flavor that enhances many dishes
- Heat tolerant and suitable for multiple growing seasons
- Non-GMO heirloom seeds from a trusted brand
- Comes with clear instructions and a germination guarantee
Cons
- Only one customer review so far, so long-term feedback is limited
- Packet size may be small for large-scale gardeners
- Requires full sun and regular watering for best results
The Sow Right Seeds Tokyo Long White Bunching Onion seeds are a fantastic choice for anyone looking to grow fresh green onions at home. This Japanese heirloom variety is known for its mild, sweet flavor and tender white flesh, making it a versatile ingredient in everything from omelets to stir-fries. Whether you are a beginner gardener or a seasoned pro, these seeds are designed to deliver a reliable harvest with minimal fuss.
One of the standout features is the high germination rate. A verified buyer tested these seeds in winter conditions using a moist paper towel and seed mat, and nearly all seeds sprouted within days. This indicates fresh, clean seeds with no signs of mold or fungus. The packet is stamped for 2026, so you can expect strong viability. The plants grow 14-24 inches tall, which is impressive for green onions, and they mature in 65-95 days, giving you a steady supply from summer through fall.
The seeds are non-GMO and heirloom, produced by a solar-powered company that takes the Safe Seed Pledge. This means you are getting a sustainable product that is safe for your family and the environment. The packet includes clear planting instructions, and the brand offers a germination guarantee if you encounter any issues. The only potential drawback is that there is only one customer review so far, so long-term performance data is limited. However, the available evidence points to a high-quality product.
Overall, these seeds are an excellent value for home gardeners. They are easy to grow, productive, and deliver a delicious, mild onion flavor that elevates any dish. If you want a reliable bunching onion that thrives in a range of climates, this is a solid pick.
Pros
- Fast harvest in about 50 days with potential for continuous cutting and regrowth.
- Colorful and flavorful mix includes red, long white, and standard green scallions, adding variety to meals.
- Low maintenance once established; suitable for small spaces like containers and raised beds.
- Heirloom, non-GMO seeds grown in the USA with a germination guarantee for peace of mind.
- Works as a cut-and-come-again crop, giving you fresh onions for weeks.
Cons
- Mixed germination reviews: some customers report excellent sprouting, but a few experienced low rates or poor seedling survival, which may depend on local conditions.
- Shipping can be slow for some orders, with at least one review noting it took a week to dispatch the packet.
- Packet count may vary occasionally; one review mentioned receiving fewer seeds than the advertised 350, though most feedback highlights generous amounts.
The Liliana's Garden Bunching Onion Mix is a curated collection of eight different scallion varieties, all packed into one convenient seed packet. Designed for both new and experienced gardeners, this mix includes types like Ishikura Improved (long white stalks), Apache (red with a sharp bite), and Heshiko (rich heirloom flavor). It's ideal for anyone who wants a continuous supply of green onions for garnishing, cooking, or fresh eating, without having to buy multiple packets of different varieties.
One standout feature is the diversity of colors and flavors. You get red, white, and green stems, so your garden and plate look as interesting as they taste. The claim of harvest in 50 days holds up well in most home gardens, especially when seeds are sown in fertile, well-drained soil with regular watering. Many users report that the seeds sprout quickly and abundantly, and that the plants regrow after cutting, extending the harvest season.
On the downside, a few customers experienced poor germination rates or weak seedlings. While the brand guarantees at least 85% germination, results can vary with temperature, soil quality, and watering consistency. There have also been occasional delays in shipping and some packets arriving with fewer seeds than advertised, though these instances seem infrequent. The product is also not suited for indoor growing unless you have strong grow lights and a controlled environment, as it prefers outdoor conditions.
Overall, this bunching onion mix offers excellent value for the price, especially for gardeners who appreciate variety and quick turnaround. The heirloom, non-GMO seeds and USA origin add to its appeal. If you follow the included growing guide and provide consistent moisture, you'll likely enjoy a steady supply of fresh scallions from spring through fall. Just be prepared for the possibility of variable germination, and order early to avoid any shipping delays.
Pros
- Authentic Vidalia variety known for sweet, mild flavor
- Organic and non-GMO seeds for clean growing
- Generous 200+ seed count for multiple plantings
- Works well in raised beds and is pest-resistant in some reviews
- Short-day type suited for fall planting and overwintering
Cons
- Some customers reported poor germination, with seeds not sprouting as expected
- Requires careful timing and fall planting for best bulb size, not ideal for all climates
- Seeds are very tiny, so you may need to order more than 200 for a full patch
KVITER's Vidalia Sweet Onion Seeds bring the famous Yellow Granex hybrid to your garden, offering a chance to grow those sweet, mild bulbs that make Vidalia onions so popular. This short-day variety is designed for southern growers, where fall planting lets the onions overwinter and develop into large, flavorful bulbs come spring. With 200+ organic, non-GMO seeds in the pack, you have plenty to work with, whether you start them indoors or direct-sow in your garden.
Real-world performance is a mixed bag based on customer feedback. Many reviewers praise the taste and ease of growth, noting the onions thrived in raised beds and even resisted pests. One happy gardener said the onions tasted great and grew easily with minimal critter trouble. However, others struggled with germination. A few reported that despite trying different methods, not a single seed sprouted, while another found that after two seasons, the bulbs never grew larger than a marble. This suggests that while the seeds are authentic, success may depend heavily on your planting conditions and timing.
Design and build quality are straightforward: these are tiny, uniform seeds in a standard packet, weighing just 0.176 ounces. The organic certification and non-GMO label are a plus for clean gardening. But be warned, the seeds are very small, so some reviewers recommend ordering more than 200 to ensure a full patch. The product care instructions are simple, requiring full sun, sandy soil, and moderate watering, but the short-day nature means you must plant in fall for the best results.
Drawbacks include inconsistent germination rates and the need for precise fall planting in southern zones. If you live in a colder climate or try spring planting, you might not get the large bulbs you expect. Still, for the price, these are a solid entry for anyone wanting to experiment with a classic onion variety. Just be ready to adjust your approach based on local conditions.
Final verdict: KVITER's Vidalia Sweet Onion Seeds are a good pick for southern gardeners who want sweet, homegrown onions, but they come with a learning curve. The organic, non-GMO seeds and generous count make them worth trying, but if you are new to onion growing, start with a small test batch to see how they perform in your soil.
Pros
- Large seed count (1600+) covers multiple beds or seasons.
- Heirloom varieties preserve genetic diversity and allow seed saving.
- Mix includes both sweet and spicy types to suit different recipes.
- Varieties bred for different uses: fresh salads, cooking, pickling, and storage.
- All seeds are non-GMO and packed in the USA, ensuring quality.
Cons
- No customer reviews yet, so real-world germination rates are unverified.
- Some varieties (e.g., Walla Walla) require specific growing conditions for best results.
- Packet does not separate seeds by variety; you must sow mixed or identify seedlings later.
The HOME GROWN 8 Onion Variety Mix is a thoughtfully curated collection of heirloom onion seeds that gives home gardeners an impressive range of flavors, colors, and growing habits. With 1600+ seeds (non-GMO, packed in the USA), this mix includes eight distinct types: Barletta, Red Burgundy, Eclipse L303, Tokyo Long White, White Grano, White Sweet Spanish Utah, Yellow Sweet Spanish Utah, and Walla Walla. Whether you want to grow large sweet bulbs for French onion soup or harvest green scallions all season long, this pack has you covered.
Each variety in this mix brings something unique to the table. Barletta is an extra-early salad onion with long green stalks and mild, tender bulbs. Red Burgundy delivers firm, purple-skinned bulbs with a spicy-sweet kick ideal for grilling or salads. Tokyo Long White is a frost-resistant Japanese heirloom that yields aromatic green tops rich in vitamins. The sweet Spanish types (both white and yellow) are known for their large size and caramelizing ability. Walla Walla, the official vegetable of Washington, has extra-sweet, crunchy flesh. This diversity means you can enjoy fresh onions from spring through fall, and store surplus bulbs for winter.
Planting is straightforward: the seeds can be started indoors or direct-sown in spring in loamy soil. Expected height is around 8 inches, and the onions grow well in both garden beds and containers. Because the seeds are mixed together, you'll get a random assortment of varieties in your harvest. Some gardeners might prefer labeled packets for targeted planting, but the mix ensures a natural variety and reduces guesswork. The package lists each variety's specific advantages, such as drought tolerance (Red Burgundy) and long storage life (Yellow Sweet Spanish Utah).
A potential drawback is the lack of user reviews at this time, so actual germination rates and plant performance are based on manufacturer claims rather than crowd-sourced feedback. Also, if you're looking to grow a single variety in bulk (say, all Walla Walla), this mix won't deliver that. But if you love experimenting and want a broad onion selection from one purchase, it's an excellent value.
Overall, the HOME GROWN 8 Onion Variety Mix is a strong choice for gardeners who appreciate heirloom seeds, diverse culinary uses, and the simplicity of buying an all-in-one pack. The quality of being non-GMO and USA-packed adds peace of mind. For the price, you get a wide genetic palette that can turn any vegetable patch into an onion lover's paradise.
Pros
- Three onion types in one purchase for variety.
- Non-GMO and grown in the USA.
- Includes planting guide for easy start.
- Flexible harvest: use as scallions or full onions.
- Suitable for multiple growing conditions.
Cons
- Cannot ship to Washington or Idaho.
- Set size varies, so bulb count is approximate.
- May require curing and proper storage for long-term use.
The Stargazer Perennials Mixed Onion Sets offer a practical way to start a home onion patch. This 1-pound bag contains a random mix of red, white, and yellow onion bulbs, all non-GMO and grown in the USA. It's designed for gardeners who want a simple, all-in-one solution to grow multiple onion types without buying separate packs. The included tip sheet makes it accessible even if you're new to growing onions from sets.
What stands out is the variety. The mix includes intermediate, day-neutral, and long-day varieties, so it adapts to different regions and seasons. You can plant them in a vegetable garden, raised bed, or container, and even grow them indoors near a window. The flexibility to harvest young as salad greens or let them mature into full-size onions adds real value. Expect roughly 80 to 100 sets per pound, though the exact count depends on bulb size.
In terms of quality, the bulbs arrive hand-sorted and ready to plant. The growing guide covers spacing (3 to 6 inches apart), when to pull (after tops fall over), and curing instructions (14 days in a cool, dry spot). This attention to detail helps ensure a successful harvest. The sets are firm and viable, with no signs of damage in typical shipments.
One limitation is that Stargazer Perennials cannot ship to Washington or Idaho, so gardeners in those states need to look elsewhere. Also, because the mix is random, you won't know the exact ratio of colors until you open the bag. Some users might prefer a more predictable assortment. But for most home growers, this is a minor trade-off for the convenience and variety.
Overall, the Stargazer Perennials Mixed Onion Sets deliver on their promise. They're a reliable, no-fuss option for anyone wanting to grow a colorful onion harvest. The non-GMO sourcing, included guide, and flexible planting options make it a solid buy for both beginners and experienced gardeners. If you're in a state where shipping is available, this pack is worth considering for your spring planting.
Frequently Asked Questions About Planting Sprouted Onions
Here are answers to common questions about how to plant an onion that has sprouted to help you succeed.
Can I plant a sprouted onion from the grocery store?
Yes, you can. Most grocery store onions are mature bulbs that will produce leaves and may eventually flower if planted. However, they are often treated to prevent sprouting, so success rates vary. Onion sets or seeds from a garden center — like the StargazerPerennials Mixed Onion Sets in our list — are bred for reliable growth.
Do I need to separate the sprouts before planting?
You can plant the entire sprouted onion or separate individual sprouts. Each sprout can develop into a separate plant, giving you more onions. Plant them about 1 inch deep with the sprout pointing up. For a diverse harvest, consider the HOME GROWN 8 Onion Variety Mix which includes multiple types.
What type of soil is best for planting sprouted onions?
Onions prefer well-draining soil rich in organic matter. If planting in a container, use a high-quality potting mix. For raised beds, amend soil with compost. Pairing with the right fertilizer can boost growth — our article on best plant food for mums 2026 bloom secrets also covers general nutrient tips that apply to onions.
How long does it take for a sprouted onion to grow?
If you plant a sprouted onion, you’ll see green shoots within a few weeks. Harvesting green onions can begin in about 30 days. For full bulb development, expect 90–120 days depending on the variety and daylight conditions. Products like the Vidalia Sweet Onion Seeds are short-day varieties best for fall planting.
Can I grow sprouted onions indoors?
Absolutely. You can plant a sprouted onion in a small pot with drainage holes and place it on a sunny windowsill. For consistent growth, consider using a grow light, especially during winter. If you’re new to indoor gardening, browse our Seed category guide for more tips on starting seeds and bulbs indoors.
Have more questions about our How To Plant An Onion That Has Sprouted recommendations? Check out our Fertilizer category for related products or see our Planter category for container options that work well for onions.
Remember, the key to successful onion gardening is patience and proper care. Whether you use a simple sprouted onion from your kitchen or invest in high-quality seeds and sets, you can enjoy a rewarding harvest. Happy planting!


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