Cool-season produce

Green onion

Allium cepa

Also known as Scallion · Spring onion · Bunching onion

Harvest before a large bulb forms. True bunching onion (*Allium fistulosum*) is another suitable type sold under the same grocery name.

EdibleCool-season crop

Growing spaceVegetable bed

Climate fitUrban core · USDA 9b–10a · Valley suburbs · USDA 9a–9b · Desert outskirts · USDA 8b–9b

Crop familyAmaryllidaceae (allium)

Life cycleAnnual crop

Phoenix planting windowSeptember–March; fall and winter are easiest.

How to plantDirect sow or set out young bunching-onion starts.

Plant spacing1–2 in for slender stalks

FrostTolerates light frost once established; cover during a hard freeze.

Time to harvestAbout 90–100 days in the Maricopa calendar; thin stalks earlier

SuccessionSow short rows every 2–3 weeks.

Special categoriesEDIBLE

Typical harvestPull stalks repeatedly through cool weather.

Right plant, right place

Will Green onion grow at your Arizona property?

Harvest before a large bulb forms. True bunching onion (*Allium fistulosum*) is another suitable type sold under the same grocery name.

Best regional fit: Urban core · USDA 9b–10a, Valley suburbs · USDA 9a–9b, Desert outskirts · USDA 8b–9b.

Light

Full winter sun; give leafy crops afternoon protection during warm fall and spring weather.

Water

Keep the vegetable root zone evenly moist with regular irrigation; adjust to rain, soil, and temperature rather than using a fixed summer schedule.

Planting & stewardship

1
Prepare a fertile, well-drained bed and keep seed or transplants evenly moist through establishment.
2
Thin to the final spacing; crowding reduces harvest quality.
3
Watch for aphids and caterpillars and protect sensitive growth from a hard freeze.
4
Harvest before sustained spring heat causes bolting or poor quality.

Read the growing reference ↗ Planting dates can shift with cultivar, weather, and your yard’s microclimate.