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When to Plant Potatoes in Hutchinson County, SD

Potatoes are a versatile staple crop that produces tubers underground. They come in hundreds of varieties with varying colors, textures, and maturity dates.

Hutchinson County, South Dakota is in USDA Zone 4b. The average last spring frost is May 1 and the first fall frost is October 6, giving you a growing season of approximately 158 days.

At an elevation of 1,008 feet, Hutchinson County receives approximately 32.1 inches of rainfall annually with predominantly loam soil. Summer highs average 83ยฐF, so choose short-season varieties of Potatoes to ensure they mature before fall.

Hutchinson County, SD (Zone 4b) Moderate season
158 days
Last Spring Frost May 1
158 growing days
First Fall Frost October 6

Hutchinson County Soil Profile

Soil Type

Loam

Soil pH

6.5-7.2

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (0 days to spare)
Start indoors: Feb 20 Transplant: May 15 🍅 Harvest: Jul 24 – Oct 2
Recommended (50%) ✗ May not fit
Start indoors: Feb 27 Transplant: May 22 🍅 Harvest: Jul 31 – Oct 9
Safe Start (90%) ✗ May not fit
Start indoors: Mar 12 Transplant: Jun 4 🍅 Harvest: Aug 13 – Oct 22

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
0.5″/week
Watering frequency 1-2 times/week
Season total 628 gal / 100 sq ft
Potatoes needs ~1,164 GDD — county provides 1,935 GDD Excellent fit

Potatoes Planting Timeline โ€” Hutchinson County, SD

Potatoes Planting Calendar

Activity When Date Range
Start Indoors February 27 Feb 27 โ€“ Mar 13
Transplant Outdoors May 22 May 22 โ€“ Jun 5
Direct Sow May 15 May 15 โ€“ Jun 5
Harvest July 31 Jul 31 โ€“ Oct 9

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

Month-by-Month Timeline

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

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

Moderate โ€” regular watering

Days to Maturity

70โ€“120 days

Soil pH

5 โ€“ 6.5

USDA Zone

Zone 4b

Growing Season

158 days

Growing Tips for Hutchinson County

Plant seed potatoes (not grocery store potatoes) 4 inches deep in spring. Hill soil around stems as plants grow to prevent greening. Stop watering when plants die back.

Companion Planting

Good Companions

Avoid Planting Near

  • Tomatoes
  • Cucumber
  • Squash Summer

Level Up Your Garden

Frequently Asked Questions

When should I plant Potatoes in Hutchinson County, SD?

Hutchinson County is in Zone 4b with an average last frost of May 1. Plan your Potatoes planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Hutchinson County, SD?

Hutchinson County, South Dakota is in USDA Hardiness Zone 4b. The average last spring frost is May 1 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 Hutchinson County gardeners in Zone 4b 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 Hutchinson County, SD. Local conditions may vary. Last updated: April 2026.