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When to Plant Celery in Schoolcraft County, MI

Celery is a marshland plant that requires consistent moisture and cool temperatures to produce crisp, flavorful stalks. It is a rewarding but demanding garden crop.

Schoolcraft County, Michigan is in USDA Zone 4b. The average last spring frost is May 14 and the first fall frost is October 12, giving you a growing season of approximately 151 days.

At an elevation of 1,121 feet, Schoolcraft County receives approximately 37.2 inches of rainfall annually with predominantly silt loam soil. Summer highs average 82ยฐF, so choose short-season varieties of Celery to ensure they mature before fall.

Schoolcraft County, MI (Zone 4b) Moderate season
151 days
Last Spring Frost May 14
151 growing days
First Fall Frost October 12

Schoolcraft County Soil Profile

Soil Type

Silt Loam

Soil pH

6-7

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (11 days to spare)
Start indoors: Mar 26 Transplant: May 7 🍅 Harvest: Jul 30 – Sep 24
Recommended (50%) ✓ Fits season (11 days to spare)
Start indoors: Apr 2 Transplant: May 14 🍅 Harvest: Aug 6 – Oct 1
Safe Start (90%) ✓ Fits season (15 days to spare)
Start indoors: Apr 15 Transplant: May 27 🍅 Harvest: Aug 19 – Oct 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
1.5″/week
Rainfall provides
1.0″/week
You supply
0.5″/week
Watering frequency 1-2 times/week
Season total 625 gal / 100 sq ft
Celery needs ~1,150 GDD — county provides 1,736 GDD Excellent fit

Celery Planting Timeline โ€” Schoolcraft County, MI

Celery Planting Calendar

Activity When Date Range
Start Indoors April 2 Apr 2 โ€“ Apr 16
Transplant Outdoors May 14 May 14 โ€“ May 28
Direct Sow May 7 May 7 โ€“ May 28
Fall Sowing July 20 Jul 20 โ€“ Aug 3
Harvest August 6 Aug 6 โ€“ Oct 1

Plant 1" deep ยท 15" apart ยท Rows 24" apart

Month-by-Month Timeline

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

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

High โ€” keep soil consistently moist

Days to Maturity

80โ€“120 days

Soil pH

6 โ€“ 7

USDA Zone

Zone 4b

Growing Season

151 days

Growing Tips for Schoolcraft County

Start seeds indoors 10-12 weeks before last frost. Keep soil consistently moist and never let it dry out. Blanch stalks by mounding soil or using collars for milder flavor.

Companion Planting

Good Companions

Avoid Planting Near

  • Carrots
  • Parsnip

Level Up Your Garden

Frequently Asked Questions

When should I plant Celery in Schoolcraft County, MI?

Schoolcraft County is in Zone 4b with an average last frost of May 14. Plan your Celery planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Schoolcraft County, MI?

Schoolcraft County, Michigan is in USDA Hardiness Zone 4b. The average last spring frost is May 14 and first fall frost is October 12.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Schoolcraft County gardeners in Zone 4b organize planting dates, track what's growing, and never miss a planting window.

Get Your Free Garden Planner →

Free download. Plan your entire garden season in minutes.

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