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When to Plant Zucchini in Pipestone County, MN

Zucchini is an incredibly prolific summer squash that can produce an abundance of fruit from just a few plants. It is versatile in the kitchen from grilling to baking.

Pipestone County, Minnesota is in USDA Zone 4b. The average last spring frost is May 4 and the first fall frost is October 2, giving you a growing season of approximately 151 days.

At an elevation of 906 feet, Pipestone County receives approximately 37.4 inches of rainfall annually with predominantly silt loam soil. Summer highs average 83ยฐF, so choose short-season varieties of Zucchini to ensure they mature before fall.

Pipestone County, MN (Zone 4b) Moderate season
151 days
Last Spring Frost May 4
151 growing days
First Fall Frost October 2

Pipestone County Soil Profile

Soil Type

Silt Loam

Soil pH

6-6.8

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (22 days to spare)
Start indoors: Mar 17 Transplant: May 19 🍅 Harvest: Jul 7 – Sep 1
Recommended (50%) ✓ Fits season (25 days to spare)
Start indoors: Mar 23 Transplant: May 25 🍅 Harvest: Jul 13 – Sep 7
Safe Start (90%) ✓ Fits season (25 days to spare)
Start indoors: Apr 3 Transplant: Jun 5 🍅 Harvest: Jul 24 – Sep 18

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
1.0″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft
Zucchini needs ~643 GDD — county provides 1,849 GDD Excellent fit

Zucchini Planting Timeline โ€” Pipestone County, MN

Zucchini Planting Calendar

Activity When Date Range
Start Indoors March 23 Mar 23 โ€“ Apr 6
Transplant Outdoors May 25 May 25 โ€“ Jun 8
Direct Sow May 18 May 18 โ€“ Jun 8
Harvest July 13 Jul 13 โ€“ Sep 7

Plant 1" deep ยท 30" apart ยท Rows 42" apart

Month-by-Month Timeline

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

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

Moderate โ€” regular watering

Days to Maturity

45โ€“60 days

Soil pH

6 โ€“ 7.5

USDA Zone

Zone 4b

Growing Season

151 days

Growing Tips for Pipestone County

Direct sow after last frost. Harvest when fruits are 6-8 inches long for best flavor and texture. Check plants daily in summer as fruits can double in size overnight.

Companion Planting

Good Companions

Avoid Planting Near

  • Potatoes

Level Up Your Garden

Frequently Asked Questions

When should I plant Zucchini in Pipestone County, MN?

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

What planting zone is Pipestone County, MN?

Pipestone County, Minnesota is in USDA Hardiness Zone 4b. The average last spring frost is May 4 and first fall frost is October 2.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Pipestone 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 Pipestone County, MN. Local conditions may vary. Last updated: April 2026.