Onion Senshyu Yellow Seeds


Bring golden harvests home year-round with Onion Senshyu Yellow Seeds! This versatile Japanese variety thrives in both spring/late winter and autumn sowings, offering two crops from a single pack. Enjoy heavy yields of semi-globe shaped bulbs with beautiful straw-coloured skins and pure white flesh, perfect for UK gardens!

Average Packets Contents: 250 Seeds
Origin: GB

In stock

SKU: L1-0104LHD Categories: ,

Onion Senshyu Yellow Seeds: Your Guide to Growing Success


Onion Senshyu Yellow is a Japanese overwintering onion variety famed for its heavy yields of semi-globe bulbs with golden skin and white flesh. It’s well-suited to the UK climate and thrives in both outdoor and under-glass environments. Perfect for beginner and experienced gardeners alike, Senshyu Yellow offers a reliable harvest and adds a delicious, versatile ingredient to your kitchen.

Growing Instructions

  • Sowing time: August is ideal for direct sowing in the ground or seed trays. If using trays, transplant seedlings to their final position by early October.
  • Planting depth: Sow seeds approximately 0.5 inches (1.25 cm) deep.
  • Spacing: Allow 18 inches (45 cm) between rows and 5 inches (12.5 cm) between plants.
  • Soil: Thrive in fertile, well-drained soil enriched with compost.
  • Watering: Maintain consistent moisture, especially during dry periods. Avoid overwatering, which can lead to rot.
  • Thinning: Once seedlings reach 6 inches (15 cm) tall, thin them to ensure optimal spacing and bulb development.
  • Harvesting: Ready for harvest when the tops turn brown and dry, typically in June or July.
  • Storage: Store onions in a cool, dry place for several months.



Additional Tips

  • Avoid spring sowings, opting for a late winter under-cover project.
  • If transplanting seedlings, consider trimming them back slightly in drier weather to minimize stress.
  • Senshyu Yellow onions act as natural pest deterrents for lettuce, cabbage, and carrots.


  • High yields of flavourful, versatile bulbs.
  • Adaptable to different growing conditions.
  • Easy to grow for gardeners of all experience levels.
  • Natural pest deterrents for other garden vegetables.

Senshyu Yellow onions offer a rewarding combination of taste, ease of cultivation, and practical benefits for your garden. Embrace this robust variety and enjoy the satisfaction of homegrown success!



Weight 15 g


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