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When to Plant Soybeans in Dickey County, ND

Dickey County, North Dakota Zone 4b May

Your May gardening checklist

Your garden in Dickey County, North Dakota is working on a schedule, even when you're not. Here's where you should be this May.

Avg. last frost May 10
Avg. first frost September 29
Soil temp (4") 52°F
Watering High
Pest pressure Low
Daylight 14.8 hrs
  1. Sow soybeans where they'll grow

    These tolerate cool soil, so you're not gambling by sowing now.

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Soybeans (edamame) are a high-protein legume that fixes nitrogen in the soil. Fresh green soybeans harvested at the edamame stage are a nutritious snack.

Dickey County, North Dakota is in USDA Zone 4b. The average last spring frost is May 10 and the first fall frost is September 29, giving you a growing season of approximately 142 days.

At an elevation of 550 feet, Dickey County receives approximately 20.9 inches of rainfall annually with predominantly loam soil. Summer highs average 81°F, so choose short-season varieties of Soybeans to ensure they mature before fall.

Dickey County, ND (Zone 4b) Short season
142 days
Last Spring Frost May 10
142 growing days
First Fall Frost September 29

Dickey County Soil Profile

Soil Type

Loam

Soil pH

6.6-7.7

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (4 days to spare)
Transplant: May 2 🍅 Harvest: Jul 25 – Sep 19
Recommended (50%) ✓ Fits season (2 days to spare)
Transplant: May 10 🍅 Harvest: Aug 2 – Sep 27
Safe Start (90%) ✓ Fits season (7 days to spare)
Transplant: May 19 🍅 Harvest: Aug 11 – Oct 6

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 Dickey County

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

Soil pH

Your soil pH (6.6–7.7) is more alkaline than Soybeans prefers (6.0–7.0). Add sulfur or peat moss to lower pH.

Soil Texture

The loam soil in Dickey County is excellent for Soybeans — good drainage, moisture retention, and nutrient holding capacity.

Drainage

Drainage is adequate for Soybeans.

Organic Matter

Organic matter is moderate (3.5%). Annual compost additions will help Soybeans.

How to Plant Soybeans

1"
Planting Depth
15"
Between Plants
24"
Between Rows

Plant Water Budget

Plant needs
1.0″/week
Rainfall provides
0.6″/week
You supply
0.8″/week
Watering frequency 2-3 times/week
Season total 1,034 gal / 100 sq ft
Drought risk

Water stress score is 6/10 — consider drought-tolerant varieties and mulching

Monthly Watering Guide for Soybeans

Soybeans needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.

Month Soybeans Needs Rainfall You Supplement Action
Jan 0.6" 0" ❄️ Dormant
Feb 0.7" 0" ❄️ Dormant
Mar 1.5" 0" ❄️ Dormant
Apr 2" 0" ❄️ Dormant
May 4.3" 2.7" 1.6" 💧 Light watering
Jun 4.3" 3.1" 1.2" 💧 Light watering
Jul 4.3" 3.1" 1.2" 💧 Light watering
Aug 4.3" 2.7" 1.6" 💧 Light watering
Sep 4.3" 2" 2.3" 🚿 Regular watering
Oct 1.3" 0" ❄️ Dormant
Nov 0.7" 0" ❄️ Dormant
Dec 0.5" 0" ❄️ Dormant

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

Soybeans 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.

Soybeans needs ~1,075 GDD — county provides 1,526 GDD Excellent fit

Soybeans Planting Timeline — Dickey County, ND

Soybeans Planting Calendar

Activity When Date Range
Direct Sow May 24 May 24 – Jun 14
Harvest August 16 Aug 16 – Oct 11

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

Month-by-Month Timeline

MonthActivities
January
February
March
April
May Direct Sow
June Direct Sow
July
August Harvest
September Harvest
October Harvest
November
December

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

1"/week · 2-3 times/week

📅 Days to Maturity

80–120 days

🧪 Soil pH

Needs 6–7 · Your soil: too_alkaline

🗺️ USDA Zone

Zone 4b

📆 Growing Season

142 days in Dickey County

Growing Tips for Soybeans in Dickey County

Direct sow Soybeans outdoors after May 10 in Dickey County when soil has warmed and frost danger has passed.

Common pests for Soybeans in this region include bean beetles and aphids. Use row covers early in the season and inspect plants weekly.

Dickey County receives only 21" of rain annually. Soybeans needs consistent moisture — install drip irrigation or water deeply 2-3 times per week.

General growing tips

Direct sow after soil warms to 60F. Plant in blocks rather than rows for better pollination. Harvest for edamame when pods are plump and bright green.

Companion Planting

Good Companions

Avoid Planting Near

  • Onion
  • Garlic

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Soybeans in Dickey County, ND?

Dickey County is in Zone 4b with an average last frost of May 10. Plan your Soybeans planting based on this frost date — see the calendar above for exact timing.

What planting zone is Dickey County, ND?

Dickey County, North Dakota is in USDA Hardiness Zone 4b. The average last spring frost is May 10 and first fall frost is September 29.

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Your Dickey County Garden Planner — Free

A 24-page printable planner built for Dickey County (Zone 4b). 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 Dickey County, ND. Local conditions may vary. Last updated: May 2026.

Sources & credits

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