Moisture range
25–45%
Days to maturity
60–70
Light
Full sun
Growing Degree Units
800 · base 40°F
When to plant scallion in your zone
Indoor-start, transplant and harvest dates calibrated to your climate.
Growing notes
Onions are shallow-rooted and require constant moisture for proper growth. Bunching onions, including scallions and Egyptian walking onions, have green stalks.
Harvest signs
when about half the tops are falling over and dry
▶Planting reference— Depth, spacing, pH, light
▶Pests & diseases— onion maggot
Common pests · 1
Onion maggot: bores into plant stems, causing the plants to turn yellow and wilt ↗
Companions & antagonists
Plant near:CarrotLettuce
Keep apart from:BeansPeas
Tip: Succession sow every 3 weeks for continuous harvest.
Common questions
How much water does scallion need?
Scallion is water-sensitive — shallow roots and a steady thirst. Keep soil moisture in roughly the 25–45% range and don't let it dry out fully, or growth stalls and leafy crops turn bitter.
Can I grow scallion in a raised bed or container?
Yes — scallion does well in raised beds and is happy in a decent-sized container too, as long as drainage is good.
Does scallion come back every year?
No — scallion is an annual. It completes its life in one season, so you replant it each year.