Zone 3 · Alliums Growing Guide

When to Plant Spring Onion / Scallion
in Zone 3

Bunching onions harvested before they bulb up. Much easier than bulb onions — no day-length concerns, just direct sow and harvest in 60–80 days. Succession sow for year-round supply.

Plant outdoors
Apr 25 – Aug 1
Start indoors
Direct sow
Last Frost
~May 15
Days to harvest
60–80 days
Difficulty
Easy
Plant now — Zone 3
Harvest window: Jun – Oct

Planting Calendar

In Zone 3, Spring Onion / Scallion should be planted outdoors Apr 25 – Aug 1, after the average last frost date of approximately May 15.

Direct sow early spring. Quick crop — can fit multiple successions in the short season.

Care Guide

Sunlight
Full sun to partial shade · 4–8 hrs/day
Watering
Regular
Spacing
1–2 inches
Soil
Loose, well-draining, fertile
Days to maturity
60–80 days
Soil pH
6.0–7.0
plant tip · Zone 3

Direct sow early spring. Quick crop — can fit multiple successions in the short season.

Feeding Schedule

How often
every 3 weeks
Feed type
balanced (10-10-10)
Key timing
throughout growing season

Light, consistent feeding produces tender green tops. Liquid feed every 3 weeks.

Succession Planting

Sow every 2 weeks

Sow every 2 weeks from early spring through summer. Spring onions are quick (60–80 days) and one of the best succession crops — a small row every 2 weeks keeps them coming all season.

Companion Planting for Spring Onion / Scallion

What you plant next to spring onion / scallion makes a real difference — some plants actively help, others compete or attract pests.

Grows well with
  • Carrots
  • Brassicas
  • Tomatoes
  • Beets
Keep away from
  • Beans
  • Peas
  • Asparagus

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Common questions

In Zone 3, direct sow spring onion / scallion outdoors Apr 25 – Aug 1 after your last frost date of approximately May 15. Direct sow early spring. Quick crop — can fit multiple successions in the short season.
Zone 3 has an average last spring frost of approximately May 15 and a first fall frost around Sep 15. These dates vary by specific location — use your ZIP code in the plant app for precision based on the nearest NOAA weather station.
Good companion crops for spring onion / scallion include Carrots, Brassicas, Tomatoes, Beets. Avoid planting near Beans, Peas, Asparagus, which can compete for nutrients or attract pests.
Spring Onion / Scallion typically takes 60–80 days from transplant or direct sow to harvest in Zone 3. Expected harvest window: Jun – Oct.

Free app · iOS February 2028

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Spring Onion / Scallion in other zones
Crop Guides