Yellow Granex | F1 Onion Seed
$6.13—$277.05gst incl.
Infamously sweet hybrid onion
Yellow Granex F1 is a short day hybrid onion with deep roots in American onion breeding. Developed from the Texas Early Grano line, it became famous in Georgia USA, as the foundation of the renowned Vidalia onion. Granex types are celebrated for their large, globe shaped, sweet yellow bulbs and exceptionally mild sweet flavour. Still grown as a Vidalia in its home region, Yellow Granex F1 brings that same tradition of sweetness and quality to the fresh market.
As a short day variety, Yellow Granex F1 begins bulbing under 10–12 hours of daylight, making it well adapted to northern Australian latitudes (20–30°S) in regions such as Queensland and northern New South Wales.
Sow in trays from February to April and transplant from March to May, ensuring seedlings are established before the shorter days of autumn trigger bulbing. With a maturity of approx 130 days harvest generally falls in June to August. Not suitable for storage, Yellow Granex F1 is best enjoyed fresh for its sweet, mild eating quality.
- Short day type
- Traditional Vidalia onion
- 130 days to maturity
- Yellow colour
- Slightly flattened globe shape
- Very large bulb size potential
- Best suited to 20–30°S latitude (northern Australia)
- Not suitable for storage
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Growing Information
Yellow Granex | F1 Onion Seed
SCIENTIFIC NAME: Allium cepa
CULTURE: Onions require full sun and fertile, well-drained soil with a pH of 6.0-7.0. Sandy loam soils are ideal; raised beds or raised rows are recommended for heavier soils to promote soil drainage.
DIRECT SEEDING: In October or early November, or as soon as the soil can be prepared in early spring, sow in a 5cm wide band, about 2 seeds/25mm, 6-12mm deep, use an X-24 or MJ-24 Jang seedwheel rows 30-45cm apart. Thin to 3-5cm apart for highest yields in fertile soil. Thin to 7-10cm apart for larger onions.
TRANSPLANTING: In short-season areas, sow seeds indoors in flats in late August to mid-September. Broadcast 12mm apart and cover 6mm. Tops may be clipped to 12cm tall. Transplant to the garden 10cm apart, or sow 5 seeds in each cell of 25-38mm diameter plug trays, thinning to 3 per cell. Transplant each cell 15cm apart. For Paperpot Transplanters use the 2.8mm seed plate and LP-15, 15cm chain pots
CULTIVATION: Keep onions well weeded with shallow cultivation.
WATER: Onions are shallow rooted and grow best with at least 25mm per week of rain or irrigation, especially during the bulbing phase.
WEEDING: Prepare the area with stale bedding, cultivating and flame weeding. Follow up after planting with a wide stirrup or collinear hoe for shallow row weeding.
DISEASES: Adequate air circulation and crop rotation aids in reducing the risk of foliar disease
HARVEST: When necks become soft and tops are falling over, pull and sun-cure at least 2-7 days, depending on weather. Move to a protected location to finish drying.
STORAGE: When dry, clip off tops and roots and store in onion bags or shallow boxes at near freezing and 65-70% humidity.
DAY LENGTH: Onion bulbing is triggered by day length, and maximum day length during the growing season increases from northern to southern Australian areas. Short-day onions are grown at higher latitudes in the northern states, while intermediate and long-day onions are grown at lower latitudes.
DAYS TO MATURITY: From direct seeding; subtract 10-15 days if transplants are used.
AVG. DIRECT SEEDING RATE: 30g/8m, 1000 seeds/15m, 5k/83m, 25k/400m, 580,000 seeds/acre, 60 seeds/linear metre, in rows 45cm apart.
TRANSPLANTS: Avg. 30g/5,000 plants, 100g/16,000
SIZED SEEDS: Standard on all varieties.
SEED SPECS: SEEDS/500grams: 100,000-130-000 (avg. 112,000).
