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When to Plant Basil in Stutsman County, ND

Stutsman County, North Dakota Zone 4a May

May in Stutsman County, North Dakota — your action list

We've pulled the most time-sensitive tasks for Stutsman County, North Dakota this May and put them front and centre. Tackle them in order.

Avg. last frost May 9
Avg. first frost September 30
Soil temp (4") 53°F
Watering Low
Pest pressure Low
Daylight 14.9 hrs
  1. Move basil from tray to bed

    Pinch off the lowest leaves on each seedling before you plant — it reduces water loss while the roots catch up.

  2. Seed basil outdoors

    Succession planting is the secret here. Put in a row now, another in 2 weeks, a third in 4.

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Basil is a fragrant warm-season herb essential to Italian and Thai cuisines. It comes in many varieties including sweet, Thai, purple, and lemon types.

Stutsman County, North Dakota is in USDA Zone 4a. The average last spring frost is May 9 and the first fall frost is September 30, giving you a growing season of approximately 144 days.

At an elevation of 907 feet, Stutsman County receives approximately 28.3 inches of rainfall annually with predominantly loam soil. Summer highs average 81°F, so choose short-season varieties of Basil to ensure they mature before fall.

Stutsman County, ND (Zone 4a) Short season
144 days
Last Spring Frost May 9
144 growing days
First Fall Frost September 30
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Stutsman County Soil Profile

Soil Type

Loam

Soil pH

6.6-7.3

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (6 days to spare)
Start indoors: Mar 6 Transplant: May 22 🍅 Harvest: Jul 17 – Sep 18
Recommended (50%) ✓ Fits season (4 days to spare)
Start indoors: Mar 14 Transplant: May 30 🍅 Harvest: Jul 25 – Sep 26
Safe Start (90%) ✓ Fits season (8 days to spare)
Start indoors: Mar 24 Transplant: Jun 9 🍅 Harvest: Aug 4 – 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 Stutsman County

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

Soil pH

Your soil pH (6.6–7.3) overlaps with Basil's range (6.0–7.0), though not a perfect match.

Soil Texture

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

Drainage

Drainage is adequate for Basil.

Organic Matter

Organic matter is excellent (4.2%) — Basil will thrive.

How to Plant Basil

0.5"
Planting Depth
8"
Between Plants
12"
Between Rows

Succession Planting Basil

3
successive plantings in your 144-day season

Sow every 5.7 weeks. Last sowing by Jul 17 to harvest before frost.

Plant Water Budget

Plant needs
0.6″/week
Rainfall provides
0.8″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft
Drought risk

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

Monthly Watering Guide for Basil

Basil needs approximately 0.6 inches of water per week (2.6" per month). Here's how your county's rainfall compares month by month.

Month Basil Needs Rainfall You Supplement Action
Jan 0.8" 0" ❄️ Dormant
Feb 1" 0" ❄️ Dormant
Mar 2.1" 0" ❄️ Dormant
Apr 2.9" 0" ❄️ Dormant
May 2.6" 4.1" 0" ✅ Rainfall sufficient
Jun 2.6" 4.2" 0" ✅ Rainfall sufficient
Jul 2.6" 3.4" 0" ✅ Rainfall sufficient
Aug 2.6" 3.3" 0" ✅ Rainfall sufficient
Sep 2.6" 2.6" 0" ✅ Rainfall sufficient
Oct 2.1" 0" ❄️ Dormant
Nov 1.1" 0" ❄️ Dormant
Dec 0.7" 0" ❄️ Dormant

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

Basil 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.

Basil needs ~672 GDD — county provides 1,548 GDD Excellent fit

Basil Planting Timeline — Stutsman County, ND

Basil Planting Calendar

Activity When Date Range
Start Indoors March 14 Mar 14 – Mar 28
Transplant Outdoors May 30 May 30 – Jun 13
Direct Sow May 16 May 16 – Jun 6
Harvest July 25 Jul 25 – Sep 26

Plant 0.5" deep · 8" apart · Rows 12" apart

Month-by-Month Timeline

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

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

0.6"/week · Natural rainfall sufficient

📅 Days to Maturity

50–75 days

🧪 Soil pH

Needs 6–7 · Your soil: acceptable

🗺️ USDA Zone

Zone 4a

📆 Growing Season

144 days in Stutsman County

Growing Tips for Basil in Stutsman County

Direct sow Basil outdoors after May 09 in Stutsman County when soil has warmed and frost danger has passed.

General growing tips

Start seeds indoors or direct sow after last frost. Pinch flower buds to extend leaf production. Harvest leaves from the top down, cutting just above a leaf pair.

Companion Planting

Good Companions

Avoid Planting Near

  • Rue
  • Sage

Check more plant combinations with our Companion Planting Checker →

🌾 Save Your Own Basil Seeds
Life Cycle Annual
Pollination Self-Pollinating
How to Collect Let flower spikes dry brown on the plant.
Storage Store airtight; viable 5 years at 35°F, under 45% humidity.

Isolate 150 ft between varieties. Different basil species can cross.

Frequently Asked Questions

When should I plant Basil in Stutsman County, ND?

Stutsman County is in Zone 4a with an average last frost of May 9. Plan your Basil planting based on this frost date — see the calendar above for exact timing.

What planting zone is Stutsman County, ND?

Stutsman County, North Dakota is in USDA Hardiness Zone 4a. The average last spring frost is May 9 and first fall frost is September 30.

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Your Stutsman County Garden Planner — Free

A 24-page printable planner built for Stutsman County (Zone 4a). 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 Stutsman County, ND. 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.