Our readers keep the lights on and my morning glass full of iced black tea. As an Amazon Associate, I earn from qualifying purchases.11 Best Onion Sets To Grow | What Smart Gardeners Plant

A handful of healthy onion sets can yield baskets full of flavorful bulbs, but the wrong batch leads to rot, bolting, or disappointing harvests. The difference between a thriving onion patch and a wasted season often comes down to variety selection, bulb viability, and understanding your region’s day-length needs. Whether you are planting in raised beds, containers, or traditional rows, choosing quality sets sets the foundation for success.

I’m Mohammad Maruf — the founder and writer behind Gardening Beyond. I spend my time analyzing horticultural market data, comparing seed and bulb quality metrics across suppliers, and studying aggregated grower feedback to help gardeners make informed decisions without the guesswork.

Choosing premium bulbs is the secret to a bountiful harvest, which is why we researched the best onion sets to grow for every home gardener.

How To Choose The Best Onion Sets To Grow

Not all onion sets are created equal. Bulb size, storage conditions, variety type, and regional adaptability all play a role in whether your effort yields golf-ball-sized bulbs or feathery tops with little below ground. Understanding a few key factors will help you pick the right sets for your garden goals.

Day-Length Classification

Onions bulb in response to daylight duration. Short-day varieties (10-12 hours) suit southern gardens (zone 7 and warmer). Long-day types (14-16 hours) perform best in northern regions (zone 6 and cooler). Intermediate-day onions handle the middle band. Choosing the wrong type for your latitude means lush tops but tiny bulbs.

Bulb Viability and Condition

Firm, dry bulbs with no soft spots or mold indicate healthy sets. Shrivelled or mushy sets are less likely to establish. Reputable sellers store bulbs in cool, dry conditions to preserve vitality. Review reports of “mushy bulbs” or “desiccated sets” can help you avoid disappointing batches.

Color and Flavor Profile

Yellow onions offer the best storage life and balanced flavor. Red onions bring milder, slightly spicy notes and vivid color to dishes. White onions deliver clean, sharp taste ideal for fresh salsas and salads. Mixed assortments let you experiment with all three in one season.

Quick Comparison

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Model Category Best For Key Spec Amazon
TomorrowSeeds 3 Colors Mix Mixed Onion Sets Best Overall ~100 Sets, Intermediate-Day Amazon
Smoke Camp Crafts Red Red Onion Sets Premium Red ~100 Sets, Long-Day Amazon
Smoke Camp Crafts White White Onion Sets Premium White ~100 Sets, Long-Day Amazon
Stargazer Mixed Assortment Mixed Onion Sets Best Value Mix 40-60 Sets, Zones 3-10 Amazon
Stargazer Red Baron Red Onion Sets Bold Flavor 50-60 Sets, Long-Day Amazon
Stargazer Yellow Stuttgarter Yellow Onion Sets Reliable Storage 50-60 Sets, Intermediate-Day Amazon
TomorrowSeeds Monique Shallot Shallot Sets Gourmet Pick 20+ Sets, Mild Sweet Flavor Amazon
Country Creek Yellow Yellow Onion Sets Budget Value 100 Sets, Easy Grow Amazon
Cool Beans N Sprouts Mixed Mixed Onion Sets Value Mix 100 Sets, Mixed Colors Amazon
Country Creek White White Onion Sets White Variety 100 Sets, Summer Harvest Amazon
CaribbeanGarden Mix Mixed Onion Sets Entry Level 30-40 Sets, Organic Notes Amazon

In‑Depth Reviews

Best Overall

1. TomorrowSeeds 3 Colors Mix Onion Sets

GMO FreeIntermediate-Day

TomorrowSeeds delivers a full pound of mixed yellow, red, and white onion sets, offering excellent variety for home gardeners who want to sample multiple colors in a single season. The intermediate-day classification makes these sets adaptable to a wide range of growing zones, reducing the risk of poor bulbing due to daylight mismatch. Customer reports consistently highlight firm, healthy bulbs upon arrival with minimal waste, and the cold-stored freshness ensures strong sprouting energy right out of the bag.

Growers in zone 2 through warmer regions have reported successful harvests, and the mix of colors provides culinary flexibility from fresh salads to long-term storage. The sets arrive well-packaged with minimal damage during transit, and the count typically meets or exceeds the advertised weight. Several reviewers noted that every bulb sprouted vigorously after planting, producing thick green tops that later matured into full-size bulbs.

For gardeners who want a single purchase that covers multiple onion types with reliable germination and strong growth, this assortment offers outstanding value. The intermediate-day tolerance makes it one of the most versatile options available, and the GMO-free certification adds peace of mind for organic-minded growers.

What works

  • Excellent variety of three colors in one purchase
  • Intermediate-day classification suits most US growing zones
  • Cold-stored bulbs arrive firm with high viability

What doesn’t

  • Occasional molded bulb found in some shipments
  • Color ratio may vary between packages
Premium

2. Smoke Camp Crafts Red Onion Sets

Long-DayDeer Resistant

Smoke Camp Crafts offers approximately 100 red onion sets tailored for northern gardens with their long-day variety classification. These bulbs produce the signature brandy-wine colored onions prized for their mild spice and vibrant appearance in salads, pickles, and roasted dishes. The packaging includes natural materials and careful handling instructions, and customer feedback consistently praises the uniform size and firmness of the bulbs upon arrival.

Growers in zones 6 and cooler report excellent establishment rates, with most bulbs sprouting within two weeks of planting. The long-day classification ensures proper bulbing during the extended daylight of northern summers, and the deer-resistant nature of allium foliage adds practical value for rural gardens. The sets mature in 80-100 days, with clear harvesting guidance provided for timing the pull.

For northern gardeners seeking a dedicated red onion crop with reliable germination and strong growth habits, these sets deliver consistent results. The generous count of roughly 100 bulbs provides ample material for sizable garden beds or multiple planting successions.

What works

  • Roughly 100 bulbs provide generous planting coverage
  • Long-day variety optimized for northern growing zones
  • Deer resistant foliage protects the crop

What doesn’t

  • Not ideal for southern gardens with short days
  • A few bulbs may fail to sprout in cold soil
Performance

3. Smoke Camp Crafts White Onion Sets

Long-DayEasy to Grow

Smoke Camp Crafts white onion sets offer the same reliable quality as their red counterpart, with approximately 100 bulbs suited for northern gardens. White onions bring a mild, clean flavor that shines in homemade salsa, chili, and fresh salads. The sets are packaged with careful attention to natural materials, and customer reviews report excellent uniformity and firmness with most bulbs sprouting vigorously after planting.

These long-day sets mature in roughly 80 days, with clear harvesting cues provided in the included instructions. Growers appreciate the deer-resistant quality of allium foliage, and the bulbs thrive in full sun with well-draining soil. The sets tolerate temperatures down to 25°F, making them resilient for early spring planting in cooler climates.

For gardeners who prefer the bright, sharp taste of white onions and need a dependable long-day variety, these sets deliver consistent performance and generous quantities. The careful packaging and natural materials add appeal for growers seeking sustainable options.

What works

  • ~100 bulbs with uniform sizing and firm texture
  • Clear harvesting guidance included with shipment
  • Cold hardy to 25°F for early spring planting

What doesn’t

  • Long-day type limits southern growing success
  • Occasional non-sprouting bulb reported
Value

4. Stargazer Perennials Mixed Onion Assortment

GMO FreeZones 3-10

Stargazer Perennials offers a thoughtfully blended mix of red, white, and yellow onion sets that includes intermediate, day-neutral, and long-day varieties to cover a broad range of growing conditions. This 8-ounce package typically contains 40 to 60 hand-sorted bulbs, and the variety mix ensures that at least some types will perform well regardless of your latitude. The GMO-free certification and tip sheet make this a great option for gardeners who want guidance along with quality bulbs.

Customer feedback from zones 3 through 10 shows strong germination rates, with many reviewers reporting that every bulb sprouted and produced healthy green tops. The ability to harvest young greens or let bulbs mature to full size adds flexibility. Several growers noted that the mix skewed toward certain colors depending on the batch, but overall satisfaction remained high due to the vigorous growth and flavor quality.

For gardeners who want a diverse onion patch from a single purchase, this assortment provides excellent genetic variety and broad zone adaptability. The included growing tips help beginners avoid common mistakes, and the hand-sorted quality control reduces the chance of damaged bulbs.

What works

  • Mixed day-length varieties suit nearly any growing zone
  • Hand-sorted bulbs with high germination rates
  • Includes planting and care tip sheet

What doesn’t

  • Some dried or unusable bulbs reported in batches
  • Color ratio varies between shipments
Premium

5. Stargazer Perennials Red Baron Red Onion Sets

Long-DayExcellent Storage

Stargazer Perennials Red Baron sets are a dedicated long-day red onion variety known for superior storage life and bold, savory flavor. The 8-ounce box contains 50-60 non-GMO bulbs that are slow to bolt, giving gardeners a wider harvest window. Customer reports from northern gardens show excellent establishment rates, with one reviewer noting 45 vigorous onions from 50 planted sets.

The Red Baron variety is specifically bred for keeping quality, meaning these onions can last months in proper storage after harvest. The bulbs deliver a strong, authentic red onion taste that enhances everything from grilling to fresh salsas. The long-day classification makes these ideal for zone 6 and cooler, and the included growing guide helps optimize planting depth and spacing.

For gardeners who prioritize storage life and bold red color in their onion crop, the Red Baron sets offer a proven variety with strong grower consensus on quality. The slow-bolting trait provides flexibility if planting is delayed by weather.

What works

  • Superior storage life for long-term keeping
  • Slow-bolting variety extends harvest window
  • Strong germination rates in northern gardens

What doesn’t

  • Some packages reported with excess peel fill
  • Not suitable for southern short-day regions
Reliable

6. Stargazer Perennials Yellow Stuttgarter Onion Sets

Non-GMOIntermediate-Day

Stargazer Perennials Yellow Stuttgarter sets are a premium intermediate-day variety that produces mildly sweet onions perfect for cooking, salads, and fresh eating. Each 8-ounce package contains 50-60 USA-grown bulbs that are more reliable than seeds or transplants, with excellent germination rates and superior keeping qualities. Customer feedback highlights the hearty nature of these sets, with most bulbs establishing quickly and producing vigorous green tops.

The intermediate-day classification allows these onions to perform well across a broad band of latitudes, making them a versatile choice for many home gardens. Growers report successful indoor starts under grow lights as well as direct outdoor planting. The included growing guide provides expert tips for maximizing harvest, and the slow-bolting trait ensures quality timing.

For gardeners seeking a classic yellow onion with reliable growth and excellent storage potential, the Stuttgarter variety delivers consistent results. The mildly sweet flavor profile works well in everyday cooking, and the USA-grown origin adds a layer of quality assurance.

What works

  • Intermediate-day variety suits a wide latitude range
  • Hearty bulbs with strong establishment rates
  • Includes expert growing guide for better harvests

What doesn’t

  • Mixed bulb sizes reported in some packages
  • Occasional desiccated bulbs in shipment
Gourmet

7. TomorrowSeeds Monique French Shallot Sets

GMO FreeMild Sweet Flavor

TomorrowSeeds Monique French Shallot sets offer a gourmet alternative to standard onions, producing elegant, mild shallots with a sweet, delicate flavor prized in fine cooking. The 20+ count package provides enough bulbs for a dedicated shallot bed or container planting. Customer feedback consistently praises the health and vitality of these sets, with reviewers noting that every bulb sprouted and produced lush growth.

These shallots thrive in sandy soil with moderate watering and full to partial sun exposure. The GMO-free certification and careful cold storage ensure the bulbs arrive fresh and ready to plant. Growers in zone 8b reported successful establishment in composted soil with slow-release fertilizer, and many noted the generous inclusion of bonus sunflower seeds with their order.

For home cooks who love the refined flavor of French shallots in vinaigrettes, sauces, and roasted dishes, these sets provide an easy path to a homegrown gourmet ingredient. The manageable count makes them ideal for smaller garden spaces or container growing.

What works

  • Gourmet shallot variety with mild, sweet flavor
  • High viability with nearly 100% sprout rate reported
  • Well-suited for containers and small gardens

What doesn’t

  • Lower bulb count compared to standard onion sets
  • Shallots require longer growing season than onions
Budget-Friendly

8. Country Creek Yellow Onion Starter Sets

100 CountEasy Grow

Country Creek LLC provides 100 yellow onion starter sets in a straightforward package designed for gardeners who want volume at a reasonable investment. These bulbs are intended for both early green table onions and full-size dry onions. Customer feedback shows strong germination rates, with one reviewer reporting 100% sprouting in a raised bed, and another noting a garden full of onions from this single purchase.

The sets arrived mold-free and viable according to most reports, though some growers noted that poor bulb development was likely due to overcrowding or insufficient sunlight rather than bulb quality. The generous count allows for experimentation with spacing and planting density, making these a good choice for beginner gardeners still refining their technique.

For budget-conscious growers who need a large quantity of yellow onion sets for expansive garden beds, this option delivers strong value. The high count provides plenty of material for succession planting, sharing with friends, or filling multiple raised beds.

What works

  • 100 bulbs provide generous planting volume
  • Excellent germination rates reported by most users
  • Suitable for both green onions and dry bulbs

What doesn’t

  • Packaging can tear during shipment
  • Bulb size variability affects uniformity
Value Mix

9. Cool Beans N Sprouts Mixed Onion Sets

100 CountMixed Colors

Cool Beans N Sprouts offers a 100-count mixed onion set assortment from Jacobs Ladder Ent, providing a random blend of white, yellow, and red bulbs for gardeners who enjoy variety. The sets arrive quickly and are well-packaged, with most customers reporting that the bulbs were in excellent condition upon arrival. One reviewer noted only one bad bulb out of 100, with the rest growing vigorously after a couple of weeks.

Germination rates vary somewhat, with some growers reporting about 40-50% sprouting while others saw near-complete establishment. Cooler spring temperatures may have affected results in some cases, but the bulbs that did come up produced excellent quality onions. The fast shipping and careful packaging are frequently mentioned positives.

For gardeners who want a large mixed batch at a modest investment and are willing to accept some variability in sprouting rates, this assortment provides good value. The high count leaves room for losses while still delivering a worthwhile harvest.

What works

  • 100 bulbs with fast, well-packaged shipping
  • Mixed colors provide harvest variety
  • Excellent condition reported by most buyers

What doesn’t

  • Inconsistent sprouting rates between batches
  • Weather conditions may impact germination
Budget-Friendly

10. Country Creek White Onion Starter Sets

100 CountSummer Harvest

Country Creek LLC offers 100 white onion starter sets for gardeners who want a dedicated white onion crop at a volume-friendly price point. These bulbs are intended to produce both early green table onions and mature dry bulbs for summer harvest. Customer feedback shows generally positive results, with bulbs appearing decent in size and healthy upon arrival, though some sets were noted to be very small.

Growers who planted these sets reported good growth over the following months, with expectations of a solid harvest. The bulbs should be kept dry and out of light until planting, and proper soil preparation is recommended for best results. Some reviewers mentioned that sorting out poorly formed bulbs before planting improves overall stand uniformity.

For budget-focused gardeners who need a large quantity of white onion sets and are comfortable with some size variability, this option provides practical value. The 100-count package offers plenty of material for filling garden beds while keeping costs manageable.

What works

  • 100 bulbs at a budget-conscious price point
  • Healthy appearance with decent bulb size
  • Suitable for green onions or dry bulbs

What doesn’t

  • Many bulbs are very small in size
  • Some sorting required before planting
Entry Level

11. CaribbeanGarden Mix Red Yellow White Onion Sets

OrganicShort-Day

CaribbeanGarden offers a mixed onion set package with red, white, and yellow varieties that are classified as short-day onions, making them best suited for southern gardens. The package typically contains 30-40 bulbs with organic material features. Customer experiences vary widely, with some southern growers reporting excellent production and almost complete germination in zone 10b raised beds.

Some customers noted that the bulbs were mostly small and several were soft, which may limit the harvest to green onions rather than full-size bulbs. The short-day classification is critical to understand before purchasing, as northern growers will not achieve proper bulbing with these sets. Some reviewers received nearly double the advertised count, though bulb condition was mixed.

For southern gardeners seeking an entry-level mixed onion set with organic credentials, this option can work well when expectations are aligned with the short-day requirement. The manageable count works well for smaller garden spaces.

What works

  • Short-day variety ideal for southern growing zones
  • Some customers received extra bulbs beyond count
  • Organic material features for natural growing

What doesn’t

  • Not suitable for northern gardens
  • Bulb condition and size can be inconsistent

Hardware & Specs Guide

Bulb Size and Viability

Larger onion sets (dime to quarter size) tend to produce bigger mature bulbs, while smaller sets often bolt or stay small. Look for firm, dry bulbs without soft spots or mold. Premium sellers cold-store their sets to preserve dormancy and ensure strong sprouting energy when planted. Avoid sets that feel light or papery, as they may have dried out during storage.

Day-Length Classification

Short-day onions (10-12 hours of daylight) are bred for southern gardens below the 35th parallel. Long-day varieties (14-16 hours) perform best north of the 40th parallel. Intermediate-day onions (12-14 hours) work well in the broad band between. Selecting the wrong day-length for your latitude results in lush tops but poor bulb development. Check your zone before ordering.

Planting Depth and Spacing

Sets should be planted with the root end down and the tip just below the soil surface, roughly 1 inch deep. Space sets 4-6 inches apart for mature bulbs, or 2-3 inches apart if harvesting as green onions. Rows should be spaced 12-18 inches apart. Proper spacing reduces competition and allows each bulb to reach full size potential.

Days to Maturity

Most onion sets reach maturity in 80-110 days depending on variety and growing conditions. Green onions can be harvested in as little as 30-40 days. Mature dry bulbs are ready when the necks soften and the tops begin to fall over. Stop watering once half the tops have fallen, then pull and cure in the sun for 2-7 days before storage.

FAQ

What are the best onion sets for beginner gardeners?
For beginners, yellow onion sets like Stargazer Yellow Stuttgarter or Country Creek Yellow are excellent choices because they are forgiving, store well, and have balanced flavor. Mixed assortments from TomorrowSeeds or Stargazer allow new growers to experiment with different colors in one purchase. Look for intermediate-day varieties if you are unsure of your zone, as they perform well across a wide latitude range.
How do I know which day-length variety to choose for my region?
Check your USDA hardiness zone and latitude. Gardeners south of the 35th parallel (zones 8-10) should choose short-day varieties. Those north of the 40th parallel (zones 3-6) need long-day onions. Gardeners in between can use intermediate-day types. If you are unsure, intermediate-day varieties offer the widest adaptability and are the safest choice for most home gardens.
Can I grow onion sets in containers instead of garden beds?
Yes, onion sets grow well in containers at least 8-10 inches deep with good drainage. Use quality potting soil mixed with compost, and space sets 4-6 inches apart. Place containers in full sun and water moderately. Container-grown onions may produce slightly smaller bulbs than in-ground plantings, but they are ideal for patios, balconies, and small spaces.

Final Thoughts: The Verdict

For most gardeners, the best onion sets to grow winner is the TomorrowSeeds 3 Colors Mix because it offers variety, intermediate-day adaptability, and excellent bulb viability at a reasonable value. If you want premium red storage onions, grab the Stargazer Red Baron. And for budget-friendly bulk planting, nothing beats the Country Creek Yellow Starter Sets for covering large garden beds without breaking the bank.