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When to Plant Scallions in Huron County, MI

Scallions (green onions) are mild-flavored alliums harvested for their slender green tops and white bases. They are quick-growing and perfect for succession planting.

Huron County, Michigan is in USDA Zone 5b. The average last spring frost is May 9 and the first fall frost is October 10, giving you a growing season of approximately 154 days.

At an elevation of 1,170 feet, Huron County receives approximately 41.8 inches of rainfall annually with predominantly silt loam soil. Summer highs average 83ยฐF, so choose short-season varieties of Scallions to ensure they mature before fall.

Huron County, MI (Zone 5b) Moderate season
154 days
Last Spring Frost May 9
154 growing days
First Fall Frost October 10

Huron County Soil Profile

Soil Type

Silt Loam

Soil pH

6.2-6.9

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (71 days to spare)
Start indoors: Mar 27 Transplant: May 1 🍅 Harvest: Jun 26 – Jul 24
Recommended (50%) ✓ Fits season (70 days to spare)
Start indoors: Apr 4 Transplant: May 9 🍅 Harvest: Jul 4 – Aug 1
Safe Start (90%) ✓ Fits season (77 days to spare)
Start indoors: Apr 17 Transplant: May 22 🍅 Harvest: Jul 17 – Aug 14

Percentages indicate frost risk at transplant. The 70% safe window means there is a 30% chance of frost after transplant — suitable for cold-hardy crops or gardeners with frost protection. The 90% safe window is best for tender plants.

Plant Water Budget

Plant needs
1.0″/week
Rainfall provides
1.1″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft
Scallions needs ~735 GDD — county provides 1,886 GDD Excellent fit

Scallions Planting Timeline โ€” Huron County, MI

Scallions Planting Calendar

Activity When Date Range
Start Indoors April 4 Apr 4 โ€“ Apr 18
Transplant Outdoors May 9 May 9 โ€“ May 23
Direct Sow April 25 Apr 25 โ€“ May 16
Fall Sowing August 1 Aug 1 โ€“ Aug 15
Harvest July 4 Jul 4 โ€“ Aug 1

Plant 0.5" deep ยท 6" apart ยท Rows 12" apart

Month-by-Month Timeline

MonthActivities
January โ€”
February โ€”
March โ€”
April Start Indoors Direct Sow
May Transplant Outdoors Direct Sow
June โ€”
July Harvest
August Fall Sowing Harvest
September โ€”
October โ€”
November โ€”
December โ€”

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

Moderate โ€” regular watering

Days to Maturity

50โ€“70 days

Soil pH

6 โ€“ 7

USDA Zone

Zone 5b

Growing Season

154 days

Growing Tips for Huron County

Direct sow every 3 weeks for continuous harvest. Thin to 1 inch apart or grow in clusters. Harvest when pencil-thick by pulling or cutting at soil level.

Companion Planting

Good Companions

Avoid Planting Near

  • Peas
  • Green Beans

Level Up Your Garden

Frequently Asked Questions

When should I plant Scallions in Huron County, MI?

Huron County is in Zone 5b with an average last frost of May 9. Plan your Scallions planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Huron County, MI?

Huron County, Michigan is in USDA Hardiness Zone 5b. The average last spring frost is May 9 and first fall frost is October 10.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Huron County gardeners in Zone 5b organize planting dates, track what's growing, and never miss a planting window.

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Data sources: USDA Plant Hardiness Zone Map (2023), NOAA 30-Year Climate Normals. Frost dates are based on 50% probability averages for Huron County, MI. Local conditions may vary. Last updated: April 2026.