500 Giant Onion Seeds – Sweet Yellow Type
Grow a large sweet yellow-type onion crop from seed. Bulb size depends on genetics, day length, spacing, fertility, moisture, and growing season, so this listing avoids promising a fixed harvest weight.
Why Choose These Seeds
- Large seed count for rows, beds, or succession sowing
- Sweet yellow-type bulbs for fresh kitchen use
- Can be started indoors for an early transplant crop
- Useful for gardeners who want to select their strongest seedlings
What’s in the Pack
Approximately 500 onion seeds. The supplier presents this as a giant sweet yellow type; a named cultivar and exact day-length classification have not been independently verified.
Growing Information
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Life cycle: Biennial plant commonly grown as an annual for bulbs
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Light: Full sun
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Start indoors: About 8–10 weeks before the last expected frost
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Transplant spacing: About 4–6 inches apart for bulb development
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Soil: Fertile, well-drained soil with steady moisture
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Harvest: Lift bulbs after tops fall and begin to dry
Planting Instructions
- Sow seeds about 1/4 inch deep in seed-starting mix.
- Keep evenly moist and provide strong light after emergence.
- Trim very long seedling tops if needed and maintain good airflow.
- Harden off and transplant outdoors into full sun.
- Water consistently during bulb formation, then reduce irrigation as tops mature.
Important: Maximum bulb size, sweetness, storage life, and day-length response cannot be guaranteed without a verified named cultivar.
Frequently Asked Questions
Are one- or two-pound onions guaranteed?
No. Exceptional bulb size requires suitable genetics and excellent growing conditions; individual results vary.
Is this a long-day onion?
The exact day-length class is not verified. Gardeners should consider local day length and test a small planting before committing a large bed.
Can I direct sow these seeds?
Yes, where the season is long enough. Starting indoors often provides more growing time for larger bulbs.
How far apart should I space onions?
About 4–6 inches is a useful range for bulb onions, with wider spacing generally allowing larger bulbs.
Where can I buy giant onion seeds for sale?
This Seed World listing provides approximately 500 sweet yellow-type onion seeds with transparent variety information.
