Senshyu Yellow | Onion Seed
$5.94—$209.13gst incl.
Traditional Japanese golden yellow onion
Senshyu Yellow is a traditional Japanese mid season, medium day onion producing round, flat, golden yellow bulbs of medium size. Developed in the Senshyu region of Honshu it has a firm texture, mild flavour, and excellent keeping quality. It is well suited to both the fresh market and long storage.
Adapted as a medium-day type, Senshyu Yellow begins bulbing under 12–14 hours of daylight, making it best suited to southern Australian latitudes (32–40°S, including Sydney, Perth, Adelaide, Melbourne, and Tasmania).
Sow in trays from May to July and transplant from July to September for bulbing through late spring into summer. Harvest generally falls in January to February, and bulbs can be held in storage for an extended period, allowing supply to continue well into autumn.
- Medium day type
- Traditional Japanese variety
- Beautiful yellow colour
- Round flat bulbs, medium size
- Best suited to 32–40°S latitudes (southern Australia)
- Long storage capability
- Mild flavour
- Fresh market and storage type
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Growing Information
Senshyu Yellow | 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).
