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When to Plant Okra in Warren County, IA

Warren County, Iowa Zone 5b May

Your May gardening checklist

May rewards gardeners who work with the weather, not against it. Here's how to stay in step this month in Warren County, Iowa.

Avg. last frost April 26
Avg. first frost October 9
Soil temp (4") 58°F
Watering Moderate
Pest pressure Low
Daylight 14.3 hrs
  1. Harden off and plant okra

    Bring a watering can to the bed. Each transplant gets a drink the moment it's in the ground, not ten minutes later.

  2. Outdoor sowing time: okra

    Keep the top inch of soil moist until germination — a gentle morning watering for 5–7 days does the job.

A few tasks this May that'll pay off in June
  • Starting indoors: okra

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Okra is a heat-loving tropical plant that produces edible seed pods. It thrives in hot summers and produces beautiful hibiscus-like flowers before setting pods.

Warren County, Iowa is in USDA Zone 5b. The average last spring frost is April 26 and the first fall frost is October 9, giving you a growing season of approximately 166 days.

At an elevation of 853 feet, Warren County receives approximately 30.5 inches of rainfall annually with predominantly silt loam soil. Summer highs average 87°F, providing good warmth for Okra during the growing season.

Warren County, IA (Zone 5b) Moderate season
166 days
Last Spring Frost April 26
166 growing days
First Fall Frost October 9
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Warren County Soil Profile

Soil Type

Silt Loam

Soil pH

5.9-6.7

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (42 days to spare)
Start indoors: Feb 21 Transplant: May 2 🍅 Harvest: Jun 27 – Aug 22
Recommended (50%) ✓ Fits season (40 days to spare)
Start indoors: Mar 1 Transplant: May 10 🍅 Harvest: Jul 5 – Aug 30
Safe Start (90%) ✓ Fits season (40 days to spare)
Start indoors: Mar 16 Transplant: May 25 🍅 Harvest: Jul 20 – Sep 14

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.

Soil Compatibility in Warren County

How your county's soil matches Okra's growing requirements.

Soil pH

Your soil pH (5.9–6.7) overlaps with Okra's range (6.0–7.5), though not a perfect match.

Soil Texture

The silt loam soil in Warren County is excellent for Okra — good drainage, moisture retention, and nutrient holding capacity.

Organic Matter

Organic matter is excellent (4.4%) — Okra will thrive.

How to Plant Okra

1"
Planting Depth
30"
Between Plants
42"
Between Rows

Succession Planting Okra

3
successive plantings in your 166-day season

Sow every 5.7 weeks. Last sowing by Aug 05 to harvest before frost.

Plant Water Budget

Plant needs
0.9″/week
Rainfall provides
0.8″/week
You supply
0.1″/week
Watering frequency Only during dry spells
Season total 190 gal / 100 sq ft

Monthly Watering Guide for Okra

Okra needs approximately 0.9 inches of water per week (3.9" per month). Here's how your county's rainfall compares month by month.

Month Okra Needs Rainfall You Supplement Action
Jan 1.2" 0" ❄️ Dormant
Feb 1.5" 0" ❄️ Dormant
Mar 1.8" 0" ❄️ Dormant
Apr 3.9" 3.1" 0.8" 💧 Light watering
May 3.9" 3.5" 0.4" 💧 Light watering
Jun 3.9" 3.7" 0.2" 💧 Light watering
Jul 3.9" 3.2" 0.7" 💧 Light watering
Aug 3.9" 3.4" 0.5" 💧 Light watering
Sep 3.9" 2.6" 1.3" 💧 Light watering
Oct 3.9" 2.4" 1.5" 💧 Light watering
Nov 2.3" 0" ❄️ Dormant
Dec 1.7" 0" ❄️ Dormant

Water needs are for active growing months only (Apr–Oct in Warren County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.

Okra Heat Requirements (GDD)

What are Growing Degree Days (GDD)?

Growing Degree Days measure the total warmth your plants receive during the growing season. Think of it as a "heat bank" — every day above 50°F deposits warmth that helps your plants grow.

Each plant needs a certain amount of accumulated heat to mature. If your county provides more GDD than the plant needs, it's a great fit. If it's close, you may want to choose faster-maturing varieties or start seeds indoors to get a head start.

Okra needs ~877 GDD — county provides 2,531 GDD Excellent fit

Okra Planting Timeline — Warren County, IA

Okra Planting Calendar

Activity When Date Range
Start Indoors March 1 Mar 1 – Mar 15
Transplant Outdoors May 10 May 10 – May 24
Direct Sow May 3 May 3 – May 24
Harvest July 5 Jul 5 – Aug 30

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

Month-by-Month Timeline

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

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

0.9"/week · Only during dry spells

📅 Days to Maturity

50–65 days

🧪 Soil pH

Needs 6–7.5 · Your soil: acceptable

🗺️ USDA Zone

Zone 5b

📆 Growing Season

166 days in Warren County

Growing Tips for Okra in Warren County

Direct sow Okra outdoors after April 26 in Warren County when soil has warmed and frost danger has passed.

General growing tips

Direct sow after soil reaches 65F. Soak seeds overnight to improve germination. Harvest pods when 2-4 inches long and still tender; they become tough if left too long.

Companion Planting

Good Companions

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Okra in Warren County, IA?

Warren County is in Zone 5b with an average last frost of April 26. Plan your Okra planting based on this frost date — see the calendar above for exact timing.

What planting zone is Warren County, IA?

Warren County, Iowa is in USDA Hardiness Zone 5b. The average last spring frost is April 26 and first fall frost is October 9.

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Your Warren County Garden Planner — Free

A 24-page printable planner built for Warren County (Zone 5b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.

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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 Warren County, IA. Local conditions may vary. Last updated: May 2026.

Sources & credits

Every number on this page traces back to a primary horticulture or government data source. Click through to verify.