Variety field guide
What to expect from Heshiko Bunching Onion Seeds
Heshiko is a Japanese bunching onion with slender white shanks, tender green tops and a clean, pungent flavor.
Read the complete product descriptionTraits, flavor, garden use, variety notes, and the full catalog record
Heshiko is a Japanese bunching onion with slender white shanks, tender green tops and a clean, pungent flavor. Slice it into soups and stir-fries, grill whole young stalks or add it fresh to salads. It grows as a clump of scallions rather than making a large storage bulb, so onion day-length categories do not apply. This cold-tolerant perennial can overwinter where conditions suit it, giving gardeners the choice of lifting whole bunches or keeping a patch for later pickings.
Japanese scallions with useful whites and tender greens.
Growing facts
- Botanical name: Allium fistulosum
- Maturity or display: 60-80 days from sowing for scallions; young stems can be picked earlier
- Mature size: Slender white shanks and green tops; commonly harvested around 12-14 in
- Spacing: 4 in between plants; rows 12 in
About the variety
Heshiko belongs to the Japanese bunching-onion tradition. Its species, Allium fistulosum, forms perennial clumps instead of the large bulbs of common storage onions. Also known broadly as Welsh or bunching onions, these plants have long been used in East Asian cooking; the word Welsh does not establish a Welsh origin.
Starting seed
Sow 1/4 in. deep in spring, or start indoors 8-10 weeks early. Sprouts in 7-10 days at 66-70 F. Thin to 4 in.; rows 12 in. Keep moist and weed gently.
Care through the season
Choose fertile, well-drained soil in full sun and keep moisture steady for tender growth. Control weeds while plants are small. Soil can be drawn gently around established shanks for longer white sections without burying the leafy growing point. Divide crowded perennial clumps and protect them where winter conditions are severe.
Harvest and use
Lift tender scallions as needed; use whites and greens fresh or cooked. Leave some clumps to regrow. For seed, let isolated flower heads brown, then dry and thresh.
Saving seed
Allow several healthy Heshiko plants to flower. Isolate from other flowering Allium fistulosum selections, which can cross through visiting insects. Collect umbels as seed capsules dry and expose black seeds, finish drying under cover, and thresh gently. Store cool and dry; onion seed loses vigor faster than many garden seeds.
Common problems
Watch for thrips, onion maggots and leaf diseases. Avoid waterlogged ground and excessive crowding. Rotate away from other alliums and remove damaged plant material; steady moisture helps prevent tough, stressed foliage.
Frequently asked questions
When can I start harvesting?
60-80 days from sowing for scallions; young stems can be picked earlier.
How should I grow it?
Choose fertile, well-drained soil in full sun and keep moisture steady for tender growth. Control weeds while plants are small. Soil can be drawn gently around established shanks for longer white sections without burying the leafy growing point. Divide crowded perennial clumps and protect them where winter conditions are severe.
Can I save seed?
Allow several healthy Heshiko plants to flower. Isolate from other flowering Allium fistulosum selections, which can cross through visiting insects. Collect umbels as seed capsules dry and expose black seeds, finish drying under cover, and thresh gently. Store cool and dry; onion seed loses vigor faster than many garden seeds.
