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When to Plant Fava Beans in Benton County, IN

Fava beans are a cool-season legume with large, meaty beans inside thick pods. They fix nitrogen in the soil and are one of the oldest cultivated crops.

Benton County, Indiana is in USDA Zone 5b. The average last spring frost is April 22 and the first fall frost is October 13, giving you a growing season of approximately 174 days.

At an elevation of 1,298 feet, Benton County receives approximately 39 inches of rainfall annually with predominantly silt loam soil. Summer highs average 83ยฐF, so choose short-season varieties of Fava Beans to ensure they mature before fall.

Benton County, IN (Zone 5b) Moderate season
174 days
Last Spring Frost April 22
174 growing days
First Fall Frost October 13

Benton County Soil Profile

Soil Type

Silt Loam

Soil pH

6.3-7

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (56 days to spare)
Start indoors: Mar 11 Transplant: Apr 15 🍅 Harvest: Jul 1 – Aug 12
Recommended (50%) ✓ Fits season (55 days to spare)
Start indoors: Mar 18 Transplant: Apr 22 🍅 Harvest: Jul 8 – Aug 19
Safe Start (90%) ✓ Fits season (52 days to spare)
Start indoors: Apr 4 Transplant: May 9 🍅 Harvest: Jul 25 – Sep 5

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
0.1″/week
Watering frequency Only during dry spells
Season total 91 gal / 100 sq ft
Fava Beans needs ~1,072 GDD — county provides 2,131 GDD Excellent fit

Fava Beans Planting Timeline โ€” Benton County, IN

Fava Beans Planting Calendar

Activity When Date Range
Start Indoors March 18 Mar 18 โ€“ Apr 1
Transplant Outdoors April 22 Apr 22 โ€“ May 6
Direct Sow April 8 Apr 8 โ€“ Apr 29
Fall Sowing August 4 Aug 4 โ€“ Aug 18
Harvest July 8 Jul 8 โ€“ Aug 19

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

Month-by-Month Timeline

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

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

Moderate โ€” regular watering

Days to Maturity

75โ€“100 days

Soil pH

6 โ€“ 7

USDA Zone

Zone 5b

Growing Season

174 days

Growing Tips for Benton County

Direct sow as early as soil can be worked in spring. Pinch growing tips when pods begin to form to redirect energy and reduce aphid problems. Stake tall varieties.

Companion Planting

Good Companions

Avoid Planting Near

  • Onion
  • Garlic

Level Up Your Garden

Frequently Asked Questions

When should I plant Fava Beans in Benton County, IN?

Benton County is in Zone 5b with an average last frost of April 22. Plan your Fava Beans planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Benton County, IN?

Benton County, Indiana is in USDA Hardiness Zone 5b. The average last spring frost is April 22 and first fall frost is October 13.

๐ŸŒฑ

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