Ishikura

Family: Amaryllidaceae Vegetable

Sweet, crisp green stalks rise in tidy bunches, with a gentle onion perfume that feels bright and clean from the first harvest.

Ishikura forms slender, hollow-tubed greens with a tender snap and a mild, well-balanced bite—ideal for fresh use and for stirring into quick skillet favorites, as well as for garnishing and pickling where its delicate flavor stays lively. Grow it for a reliable 60-day rhythm of uniform bunches that look as good as they taste in the garden.

Light: Full SunMaturity: 60 DaysHabit: Upright

Planting schedules and alerts are optimized for Columbus (Zone 6b).

Crop Dates

Milestone	Date
Start Indoors	Mar 14th
Last Frost	Apr 25th
Transplant / Sow Outdoors	Jun 13th
Harvest Begins	Aug 12th
Harvest Ends	Oct 16th

Crop Details

Trait	Value
Days to Maturity	60
Sun Requirements	Full Sun
Growth Habit	Upright
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	70
Min Soil Temp (°F)	45
Min Night Temp (°F)	35
Harden Off (days)	7

Culinary Notes

Chef's Note

Ishikura’s slender hollow stalks give you maximum crunch with a mild onion bite—no harsh bite, no lingering sulfur on the tongue. It’s the kind of allium that earns its keep in quick heat (last-minute stir) and stays snappy when pickled.

Best Uses

thinly slice for raw garnish on noodles, dumplings, or rice bowls
stir-into quick hot pans at the last minute for a bright, non-bitter onion note
use in fast pickles where the hollow greens stay crunchy
fold into egg scrambles or ramen toppings for that fresh, tubular crunch

Flavor Profile

gentle onion perfume crisp, tender snap mild, well-balanced bite clean, green finish

Kitchen Pairings

ginger soy sauce sesame oil garlic chili paste rice vinegar

Frequently Asked Questions

What pest or disease commonly affects Allium fistulosum (Ishikura) and how do I control it?

Watch for onion thrips and downy mildew; both show up as silvery streaking or distorted leaves, and downy mildew can create gray-purple growth on leaf tips in humid weather. Remove and discard badly affected leaves early, then space plants well so air moves through the bunching onion bed. If thrips are present, spray with insecticidal soap and repeat as needed every 5–7 days until new growth is clean.

How often should I water Ishikura bunching onions during active leaf growth?

During the main growing phase, keep the top 1–2 inches of soil consistently moist but not waterlogged—aim for watering when the surface starts to dry, typically about 1–2 times per week depending on heat. Because Allium fistulosum forms its usable leaves near the soil surface, uneven moisture can cause tougher, less tender leaves. Mulch lightly to reduce fast drying, and avoid soaking the crown to prevent rot.

How can I tell when Ishikura (Allium fistulosum) is ready to harvest?

Harvest when plants are about 8–12 inches tall (around 60 days), with firm, green, hollow leaves that are thick enough to bunch. You can harvest leaf-by-leaf earlier for cut-and-come-again, but for the best yield, take a main harvest when most plants reach a similar size. If leaves start to thin and look overly stringy, harvest promptly.