Ishikura Bunching Onion, Heirloom Seeds

Ishikura Bunching Onion — The Japanese Heirloom That Harvests May Through October

Ishikura is the bunching onion that redefines what a green onion can be. Unlike standard types that require succession sowing every three weeks, Ishikura’s exceptionally long harvest window — May through October when sown March through July — means you plant once and harvest continuously with zero waste. No bulbing, no bolting, no fuss.

Long, white, tender stalks grow pencil-thin for spring onion use or can be left to thicken to carrot-width without losing any flavor. Cold hardy and adaptable to virtually any climate, Ishikura is equally at home in raised beds, containers, or open garden rows.

Why Grow Ishikura?

• Harvest May through October — no succession sowing needed, unlike standard green onions
• Long white tender stalks — use pencil-thin as spring onions or grow thick as a carrot
• No bulbing — pure stalk production, all season long
• Cold hardy & adaptable — suitable for late crops and overwintering
• Excellent in containers — thrives in pots, raised beds, and small spaces
• Open-pollinated heirloom — save seed year after year

Growing Notes

Sow directly outdoors from March through July for a May–October harvest. Sow seeds ¼ inch deep in fertile, well-drained soil, 1 inch apart in rows 12 inches apart. Thin to 2–3 inches for full-sized stalks. For long, white, blanched stems, mound soil up around the base of plants as they grow (earthing-up method). Water consistently. Harvest at any stage — leaves for salads or whole plants pulled at any size.

Packed and shipped by Box Garden Seeds LLC — heirloom seeds grown without GMOs, selected for flavor, resilience, and your garden’s success.