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Onion (Senshyu Yellow) Set
  • Onion (Senshyu Yellow) Set
  • Senshyu Winter Onion set in hand

Senshyu Onion Set

250g - Approx 75 Bulbs

An over-wintering Japanese onion yielding the first bulb onions of the season. Beautiful, straw-coloured bulbs by early July. Excellent quality. Delivery Starts from 5th September.

Out of stock

    Allium cepa


    300 Days


    Hardy Annual

  • Plant Size

    Height Up To 45cm (17.7in) Spread Up To 10cm (3.9in)

  • Hardiness & Longevity

    Hardy Annual

  • Ideal For

    Kitchen Garden

  • Position In

    Full Sun


Senshyu Onion Set

[300 days] One the first onions of the season, Shenshyu yellow globes were introduced to the UK from Japan in the early 70's. In the decades since, it’s proven to be a hardy, overwintering onion that can survive temperatures down to minus 18°C (0°F). The plant itself offers superb bulbs with crisp, white flesh and straw-coloured skins.

This particular onion grows well in heavy soils and provides large bulbs with half the effort of spring-sown varieties. And since they’re ready for harvest during the drier months of June and July, outdoor curing is as easy as pie!

Recommended by the National Institute of Agricultural Botany.

Height: 45cm (18"). Spread: 10cm (4").

Delivery starts in late October - December.

Senshyu Autumn Planting

This Japanese variety produced a semi globe-shaped, mild flavour onion. Although planting is recommended early September to mid-October you can plant this onion during a milder winter as late as December the later you plant the later the harvest will be. This popular Japanese onion offers excellent storage making it one of the better onions in our opinion to grow and store. To get the most out of this onion once lifted from the ground removed all dirt and allow to dry in the greenhouse or on a wire rack in full sun. Do not allow the onions to get wet!

Once dry (allow 5-7 days) inspect the bulb for any damage - damaged or bruised onions can be used now, the others can be stored in a shed or cool area out of direct sunlight and away from moisture, the onions will keep for 8-12months without any problems.

Common Questions

What is a Senshyu Onion set? Senshyu Onion sets are part-grown bulbs, that continue to grow once planted out in your garden or containers. Sets can be planted at different times of the year depending on the variety.

Should you soak Senshyu Onion Sets before planting in the garden? You don't have to soak your Senshyu onion sets before planting, however many gardeners believe that soaking your onion sets will sprout quicker than without. The main benefit of soaking your Onion sets before planting is to increase germination rates.

How deep do you plant bulbs from an Onion set? You should plant your Senshyu Onion sets as soon as the soil in your garden can be moved. Plant the onions at a depth of 1 1/2 inches, in rows 15 inches apart.

Product Features

Germination Time
7 - 14 Days
Sowing Method
Direct to Ground
Grow in Greenhouse
Optional, for Early Crop
Number of Seeds Per Packet
250g (68 - 80 sets)
Recommended Soil pH
5.6 - 6.6


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