How Deep to Plant an Onion Bulb: Planting Depth Guide for 2026

The Simply Seed Sweet Yellow Onion Bulbs are a popular choice for home gardeners who want a reliable, high-yielding onion variety. This long-day onion is bred for northern and southern climates alike, forming bulbs when daylight lasts 8-10 hours. It's non-GMO, naturally grown, and raised in America - a solid option for anyone who values seed integrity and straightforward gardening.

In terms of performance, these onions consistently produce heavy bulbs that can reach up to 1 pound each, with a sweet, mild flavor that works great fresh or cooked. Many reviewers report good germination rates and vigorous growth, especially when planted in well-drained soil with full sun. The storage life is a standout feature: properly cured bulbs can keep for 6-8 months, giving you homegrown onions well into winter. Some users note that not every bulb hits the 1-pound mark, but overall yields are substantial for a standard garden pack.

The bulbs arrive as sets (small onion bulbs) ready for planting. They typically come in a bag with 60-80 pieces. Quality control can be a minor issue - a few customers mention finding mold or rot from moisture during shipping. It's wise to open the package upon arrival, remove any soft or damaged bulbs, and plant the healthy ones promptly. The sets are generally firm and fresh, with many already showing green tips when received, which signals they're ready to grow.

Drawbacks are limited but worth noting. Besides the occasional size discrepancy, germination can be uneven if the soil is too wet or compacted. Also, the long-day requirement means they may not perform as well in extreme southern areas with short summer days. But for most of the U.S., this variety is a dependable performer. The price is reasonable for the quantity, and the seller offers a guarantee on growth results.

Overall, the Simply Seed Sweet Yellow Onion Bulbs are a solid buy for any gardener who wants a sweet, storing onion that delivers consistent results. They're easy to plant, adaptable, and backed by positive customer experiences. Just handle the sets carefully at planting time and give them proper conditions, and you'll be rewarded with a bountiful harvest that lasts months.

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.

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.

If you are looking to grow your own onions at home, the CoolBeansNSprouts Red Onion Bulb Sets offer a straightforward and affordable way to get started. This package contains 100 red onion bulb sets, which are essentially small bulbs ready to plant in your garden or containers. The brand is upfront about one thing: they do not guarantee the size, shape, or form of the bulbs. That means you will receive a random assortment of sizes, but you will get the full count you paid for.

The standout feature here is the quantity. For the price, you get a hundred bulbs, which is enough to fill a decent-sized garden bed or several containers. Onions are a versatile crop; you can harvest them young as scallions or let them mature into full-sized bulbs. The planting instructions provided are clear: plant in spring or fall, bury the sets 1-2 inches deep with the pointy end up, and space them 2-6 inches apart. They need full sun and moderate watering, about an inch per week. If you want sweeter onions, you can water a bit more.

One thing to consider is the lack of reviews. With a rating of 3.9 but zero user feedback, it is hard to gauge real-world performance. The disclaimer about random sizes might be a concern if you are expecting uniform bulbs. However, for the price, it is a low-risk experiment for home gardeners. The bulbs are natural products, so some variation is normal. If you have sandy soil and a sunny spot, these should grow well.

In terms of design and build, these are just raw onion bulbs, so there is not much to say. They come in a simple bag. The key is to plant them correctly and provide the right conditions. The instructions mention that planting too deep can affect bulb development, so follow the guidelines.

Overall, the CoolBeansNSprouts Red Onion Bulb Sets are a solid value for gardeners who want to try growing onions from sets rather than seeds. The large quantity and clear planting advice make it beginner-friendly. Just keep in mind the variability in bulb sizes and the absence of customer reviews. If you are okay with that, these are a good buy for your home garden.

The Bonnie Plants Candy Onion 4-Pack is a solid choice for home gardeners who want to grow their own sweet onions without a lot of hassle. This live plant set includes four day-neutral bunched onion sets that are ready to go into the ground. They are designed for raised beds or in-ground gardens, making them accessible whether you have a small backyard plot or a more established garden. The Candy Onion is known for its large, white/yellow bulbs that can reach up to 6 inches across, and its sweet flavor makes it a favorite for fresh eating and cooking alike.

One of the standout features here is the disease resistance. Onions can be prone to issues like rot or fungal diseases, but this variety is bred to handle those problems better. That means less time worrying about plant health and more time enjoying your harvest. The plants grow tops 12 to 18 inches tall, and you should space them 6 inches apart after separating the bunch. They mature in 90 to 100 days, which is a reasonable timeframe for a sweet onion. In real-world use, these onions perform well in full sun with rich, well-draining soil. They are day-neutral, so they don't rely on specific day lengths to bulb up, which gives you more flexibility in different climates.

Design and build quality are straightforward. You get four bunched sets that are live plants, not seeds, so you skip the germination stage. They are ready to transplant as soon as the soil is workable. The plants are healthy and vigorous when they arrive, though you should handle them carefully. The packaging is simple but effective for keeping the roots moist during shipping. There are no fancy extras, just solid, reliable plants that do what they promise.

There are a couple of things to keep in mind. First, these onions need consistent moisture and fertile soil to reach their full size. If you have poor soil or forget to water, you might end up with smaller bulbs. Second, the 4-pack is a modest start. If you want a big harvest for storage or large-scale cooking, you will need to buy multiple packs. Also, they require full sun, so a shady spot won't work. These are not major drawbacks, but they are worth considering before you buy.

Overall, the Bonnie Plants Candy Onion 4-Pack is a great option for home cooks and gardeners who want a reliable, sweet onion with minimal fuss. The disease resistance and day-neutral nature make it a versatile choice, and the large bulbs deliver on flavor. If you have a sunny spot and decent soil, this is a solid investment for your garden. It earns a strong recommendation for anyone looking to grow their own sweet onions.

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.

The Egyptian Walking Onion, also known as the tree onion or topset onion, is one of the most fascinating and low-maintenance vegetables you can grow. This heirloom perennial produces small bulbs at the top of the stalk instead of flowers, which then bend to the ground and replant themselves - hence the name "walking." If you want a nearly foolproof crop that gives you both green onions and storage bulbs with minimal work, this is it.

In terms of real-world performance, these onions live up to the claim of being easy. They thrive in full sun with moderate watering and aren't picky about soil. The critter resistance is a huge plus - deer and rabbits typically ignore them, unlike many other garden plants. You can harvest the green tops as scallions early in the season or let the bulbs mature for a stronger flavor. The topsets (small bulbs at the top) can be replanted or eaten too, so you get a continuous supply.

Design-wise, the bulbs are typical onion sets - nothing fancy. They ship as dormant bulbs ready to plant. The organic label is a bonus for those avoiding synthetic inputs. One thing to note: these onions are perennial and will multiply over time. They can form a dense ground cover, which is great for weed suppression but might be too aggressive for small, tidy gardens. If you have space, they're a fantastic addition.

Drawbacks are few but worth mentioning. They do need full sun - part shade will reduce vigor. And while they're drought-tolerant once established, they appreciate occasional water during dry spells. Also, because they spread on their own, you'll want to give them room or be prepared to thin them out each year. But for the effort required, the payoff is excellent.

Overall, the Egyptian Walking Onion is a smart choice for any gardener looking for an easy, productive, and interesting perennial onion. Whether you're a beginner or an experienced grower, these bulbs will reward you with years of harvests. Just plant them and stand back.