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When to Plant Lentils in Hancock County, IA

Lentils are an ancient pulse crop producing small, lens-shaped seeds packed with protein and iron. They grow on short, bushy plants and are surprisingly easy to cultivate.

Hancock County, Iowa is in USDA Zone 4b. The average last spring frost is April 29 and the first fall frost is October 7, giving you a growing season of approximately 161 days.

At an elevation of 979 feet, Hancock County receives approximately 36.9 inches of rainfall annually with predominantly silt loam soil. Summer highs average 83ยฐF, so choose short-season varieties of Lentils to ensure they mature before fall.

Hancock County, IA (Zone 4b) Moderate season
161 days
Last Spring Frost April 29
161 growing days
First Fall Frost October 7

Hancock County Soil Profile

Soil Type

Silt Loam

Soil pH

6.1-6.7

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (37 days to spare)
Start indoors: Mar 11 Transplant: Apr 22 🍅 Harvest: Jul 15 – Aug 26
Recommended (50%) ✓ Fits season (35 days to spare)
Start indoors: Mar 18 Transplant: Apr 29 🍅 Harvest: Jul 22 – Sep 2
Safe Start (90%) ✓ Fits season (30 days to spare)
Start indoors: Apr 1 Transplant: May 13 🍅 Harvest: Aug 5 – Sep 16

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
0.5″/week
Rainfall provides
1.0″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft
Lentils needs ~1,164 GDD — county provides 1,972 GDD Excellent fit

Lentils Planting Timeline โ€” Hancock County, IA

Lentils Planting Calendar

Activity When Date Range
Start Indoors March 18 Mar 18 โ€“ Apr 1
Transplant Outdoors April 29 Apr 29 โ€“ May 13
Direct Sow April 22 Apr 22 โ€“ May 13
Fall Sowing July 15 Jul 15 โ€“ Jul 29
Harvest July 22 Jul 22 โ€“ Sep 2

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

Month-by-Month Timeline

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

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

Low โ€” drought tolerant

Days to Maturity

80โ€“110 days

Soil pH

6 โ€“ 8

USDA Zone

Zone 4b

Growing Season

161 days

Growing Tips for Hancock County

Direct sow in early spring as lentils tolerate frost. Provide short supports as plants tend to lodge. Harvest when lower pods turn brown. Pull entire plants and dry in bundles.

Companion Planting

Good Companions

Avoid Planting Near

  • Onion
  • Garlic

Level Up Your Garden

Frequently Asked Questions

When should I plant Lentils in Hancock County, IA?

Hancock County is in Zone 4b with an average last frost of April 29. Plan your Lentils planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Hancock County, IA?

Hancock County, Iowa is in USDA Hardiness Zone 4b. The average last spring frost is April 29 and first fall frost is October 7.

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Plan Your Garden with Confidence

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