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When to Plant Turnip in Arenac County, MI

Turnips are a fast-growing cool-season root vegetable with edible roots and greens. Baby turnips are sweet and tender while mature ones are more pungent.

Arenac County, Michigan is in USDA Zone 5a. The average last spring frost is May 12 and the first fall frost is October 6, giving you a growing season of approximately 147 days.

At an elevation of 1,015 feet, Arenac County receives approximately 30.5 inches of rainfall annually with predominantly silt loam soil. Summer highs average 86ยฐF, providing good warmth for Turnip during the growing season.

Arenac County, MI (Zone 5a) Short season
147 days
Last Spring Frost May 12
147 growing days
First Fall Frost October 6

Arenac County Soil Profile

Soil Type

Silt Loam

Soil pH

6.2-7.1

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (70 days to spare)
Transplant: May 6 🍅 Harvest: Jun 17 – Jul 22
Recommended (50%) ✓ Fits season (70 days to spare)
Transplant: May 12 🍅 Harvest: Jun 23 – Jul 28
Safe Start (90%) ✓ Fits season (72 days to spare)
Transplant: May 25 🍅 Harvest: Jul 6 – Aug 10

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
0.9″/week
You supply
0.4″/week
Watering frequency 1-2 times/week
Season total 561 gal / 100 sq ft
Turnip needs ~725 GDD — county provides 2,131 GDD Excellent fit

Turnip Planting Timeline โ€” Arenac County, MI

Turnip Planting Calendar

Activity When Date Range
Direct Sow April 28 Apr 28 โ€“ May 19
Fall Sowing July 28 Jul 28 โ€“ Aug 11
Harvest June 9 Jun 9 โ€“ Jul 14

Plant 0.5" deep ยท 4" apart ยท Rows 12" apart

Month-by-Month Timeline

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

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

Moderate โ€” regular watering

Days to Maturity

40โ€“60 days

Soil pH

6 โ€“ 7

USDA Zone

Zone 5a

Growing Season

147 days

Growing Tips for Arenac County

Direct sow in early spring or late summer. Harvest when roots are 2-3 inches in diameter for best flavor. Both the roots and the greens are nutritious and edible.

Companion Planting

Good Companions

Avoid Planting Near

  • Potatoes

Level Up Your Garden

Frequently Asked Questions

When should I plant Turnip in Arenac County, MI?

Arenac County is in Zone 5a with an average last frost of May 12. Plan your Turnip planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Arenac County, MI?

Arenac County, Michigan is in USDA Hardiness Zone 5a. The average last spring frost is May 12 and first fall frost is October 6.

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Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Arenac County gardeners in Zone 5a 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 Arenac County, MI. Local conditions may vary. Last updated: April 2026.