Spring Onion 750 Seeds Long White Ishikura | Allium fistulosum Japanese Bunching Onion

£1.24

Estimated Delivery between November 09 and November 11.

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Allium fistulosum 'Long White Ishikura'
Japanese bunching onion with long, slender white stems and a fresh, mild flavour

Allium fistulosum 'Long White Ishikura' is a distinctive Japanese bunching onion grown for its exceptionally long, straight white stems and fresh green leaves. Unlike traditional bulb onions, this variety does not develop a rounded bulb, instead producing elegant, leek-like shafts with a crisp texture and a delicate, mild onion flavour.

Easy to grow and versatile in the kitchen, Long White Ishikura can be harvested young as slender salad onions or left to develop thicker, more substantial stems. Both the white shafts and green leaves are edible, making them ideal for salads, sandwiches, stir-fries, soups and Asian-inspired dishes. Its upright growth and flexible harvesting period make it a practical choice for kitchen gardens, allotments and raised beds.

Why You'll Love It

● Produces exceptionally long, straight white stems

● Non-bulbing variety with an attractive leek-like appearance

● Crisp, tender texture and a fresh, mild onion flavour

● Both white stems and green leaves are edible

● Can be harvested young or grown on for thicker stems

Ideal For

● Fresh salads and sandwiches

● Stir-fries and Asian-inspired cooking

● Kitchen gardens and vegetable plots

● Allotments and raised beds

● Patio containers and small-space growing

How to Sow & Grow (UK)
Sow indoors: February–April
Plant out: April–May, after hardening off, when seedlings are established and conditions are suitable
Direct sow: April–June, once the soil begins to warm
Flowering: Usually harvested before flowering; harvest approximately May–October, depending on sowing time and growing conditions
Life cycle: Hardy perennial, usually grown as an annual vegetable crop
Germination temperature: Approximately 15–20°C (59–68°F)
Average germ time: Approximately 7–21 days
Depth: Sow approximately 10–15 mm (⅜–½ in) deep and cover with fine soil or compost
Light required: No – seeds should be covered after sowing
Moisture: Keep soil consistently moist during germination and establishment; water regularly during dry weather
Environment: Full sun, with light partial shade tolerated
Soil type: Fertile, moisture-retentive but well-drained soil
Plant spacing: Approximately 5–7 cm (2–3 in) between plants and 25–30 cm (10–12 in) between rows
Mature height: Approximately 30–50 cm (12–20 in)
Expert Growing Tips

● Sow small batches every few weeks from spring to early summer to maintain a steady supply of fresh spring onions throughout the growing season.

● For longer, blanched white stems, gradually draw loose soil around the base of the plants as they develop, taking care not to bury the green leaves.

● Harvest young when the stems are approximately pencil-thick for particularly tender salad onions, or allow them to grow larger for cooking.

● Keep the soil evenly moist, especially during warm, dry spells. Irregular watering can slow growth and affect stem tenderness.

● Long White Ishikura does not form traditional rounded bulbs, so harvest according to stem thickness rather than waiting for bulbs to develop.

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