Spring Onion Ishikura

What Spring Onion Ishikura is

Spring Onion Ishikura (Allium cepa) is a biennial crop grown for harvest as early as the first year, from the onion family (Amaryllidaceae). This variety produces long white stems with short green tops, which can be pulled when slender.

It does not form a bulb, so it looks almost like a young leek. It has a fine mild flavour, which makes it ideal for salads.

Onions contain large amounts of provitamin A, vitamins C, E, K and above all B vitamins, as well as calcium and potassium salts, which de-acidify the body.

The essential oils contained in onion juice have medicinal properties.

Onion from seed is the cheapest and surest way to a large harvest — for spring onions, onion sets or big bulbs for winter.

Key features

• Measured germination rate of the batch: 88%
• Seeds per packet: 267–362 pcs (0.7 g)
• Seed origin: Italy
• Sowing: March and April, and September and October; direct or as seedlings
• Harvest: June – October
• Position: sunny spot

When to sow Spring Onion Ishikura

Spring Onion Ishikura seeds are sown in March and April and September and October. Harvest in June – October. The months are a guide for a temperate climate — in warmer areas sow 1–2 weeks earlier, in cooler or upland areas, later.

How to sow and grow Spring Onion Ishikura

• Sowing method: direct or seedlings
• Depth: 1–1.5 cm
• Spacing: 8–10 cm in the row, 25–30 cm between rows
• Germination: 10–14 days at 15–20 °C
• Position: sunny spot

The variety is very hardy and therefore perfectly suited to perennial growing. It can be sown from early March for a summer harvest, as well as in autumn for a winter harvest in spring. Early sowing can be done in a greenhouse. Sow the seeds at a depth of 1.5 cm, with rows 30 cm apart. apart. This plant requires well-worked soils rich in nutrients to grow well and give abundant crops.

Sow in early spring in loose, weed-free soil. Weed regularly — onions do not tolerate competition. Stop watering 3–4 weeks before harvest.

Harvest and use

The bulbs are harvested when the neck softens and the leaves flop over; dry them in the shade for 2 weeks before storing.

Frequently asked questions

When should Spring Onion Ishikura be sown?

The recommended months for sowing are March and April and September and October. Sowing method: direct or seedlings.

How many seeds are in the packet?

The packet contains 267–362 seeds, pack size 0.7 g.

What is the germination rate of the seeds?

The measured germination rate of this batch is 88%. The test was carried out under controlled laboratory conditions; in the field, emergence depends on soil, temperature and moisture.

Can a large onion be grown from seed in one year?

Yes — with early sowing (February–March) for seedlings or direct, most varieties form bulbs in the very first year.