Onion Super Star F1
Best sweet onion for home gardeners across all North American climates.
Introducing the Onion Super Star F1, an All-America Selections Winner perfect for growers across North America. This hybrid onion variety is day-length neutral, maturing approximately 20 days earlier than comparable White Sweet Spanish types. It produces attractive, globe-shaped bulbs with a mild, sweet flavor and excellent skin retention. Super Star F1 requires an intermediate daylength of 12-14 hours for bulbing and is best suited for fresh market use rather than long-term storage.
$5.46
Owner Satisfaction
4.7
/ 5
Category Rank
270
/ 6090
#270 in Seeds & Seed Tape
Price vs Category Average
-49%
Below average
Daylength
1214
/ Intermediate Day (- hours)
Who it's for
- Market gardeners seeking consistent, high-volume harvests
- Home growers in diverse climates needing disease-resistant crops
- Homesteaders planning for long-term winter food storage
Who should skip it
- Budget-conscious gardeners preferring affordable open-pollinated seeds
- Seed-saving enthusiasts wanting to propagate their own stock
- Gardeners in regions with short, limited growing seasons
Performance breakdown
Regional Versatility
Day-neutral genetics ensure reliable performance across diverse North American climates.
Maturation Speed
Reaches harvest twenty days faster than standard sweet onion varieties.
Flavor Profile
Delivers a classic mild, sweet taste ideal for fresh culinary applications.
Storage Longevity
Best enjoyed fresh as this variety lacks long-term storage capabilities.
Uniformity
Produces consistent globe-shaped bulbs that look professional in every harvest.
Germination Reliability
Predictable sprout times make planning your garden schedule straightforward and simple.
Key Specs
Daylength
Intermediate Day (12-14 hours)
Maturation Days
95 Days
Seed Count
250 seeds
Planting Method
Transplant
Seeding Depth
0.25-0.5 inches
Soil Temperature for Planting
60-65°F
Germination Time
7-12 Days
Spacing in Row
2-4 inches
Features
- Grows anywhere in North America
- Matures 20 days earlier
- Mild and sweet flavor
- Excellent skin retention
- Globe-shaped uniformity
- All-America Selections Winner
- Hybrid variety
- Intermediate daylength onion
What customers say
Gardeners highly recommend the 'Onion Super Star F1' seeds for their exceptional quality and reliability. Customers consistently report outstanding germination rates, building immediate confidence. The resulting bulbs are a major highlight, praised for achieving impressive, large sizes and remarkable uniformity across various growing conditions. This F1 hybrid offers dependable performance, making it a staple for many growers. Reviewers also appreciate the mild, satisfying flavor profile suitable for all uses. The consensus is clear: this variety delivers superior yield and quality, making it a highly valued choice for serious onion cultivation.
Know before you buy
No, this variety is intended for fresh market use. It is best enjoyed shortly after harvest rather than being kept in long-term storage.
This means the onion requires 12 to 14 hours of daylight to trigger bulb formation. Because of this specific requirement, it is versatile and can be grown successfully in most regions across North America.
The recommended planting method is transplanting. You should start your seeds indoors and transplant them into the garden once they are established to ensure the best results.
Super Star F1 typically reaches maturity in approximately 95 days. This is about 20 days faster than comparable White Sweet Spanish varieties.
For optimal germination, ensure your soil temperature is between 60-65°F. Plant the seeds at a depth of 0.25 to 0.5 inches and provide moderate watering.
Space your plants 2 to 4 inches apart within the row, with 1 to 3 feet between each row. This spacing allows for proper airflow and bulb development.
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