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When to plant Thai Basil in Crow Wing County, MN

Plant Thai Basil in Crow Wing County from May 12 to June 2 in spring. Crow Wing County sits in USDA Zone 4a, with last frost around May 5 and first frost on October 3.

When to Plant Thai Basil in Crow Wing County, MN

Crow Wing County, Minnesota Zone 4a August

Your August planting checklist for Crow Wing County, Minnesota

Your Crow Wing County, Minnesota garden is entering a new phase. Here's what's on the schedule for August and why each task matters now.

Avg. last frost May 5
Avg. first frost October 3
Soil temp (4") 69°F
Watering Moderate
Pest pressure Moderate
Daylight 14 hrs

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Thai basil has a distinctive anise-licorice flavor with sturdy purple stems and small leaves. It is essential in Thai, Vietnamese, and other Southeast Asian cuisines.

Crow Wing County, Minnesota is in USDA Zone 4a. The average last spring frost is May 5 and the first fall frost is October 3, giving you a growing season of approximately 151 days.

At an elevation of 783 feet, Crow Wing County receives approximately 33.2 inches of rainfall annually with predominantly silt loam soil. Summer highs average 78°F, so choose short-season varieties of Thai Basil to ensure they mature before fall.

Crow Wing County, MN (Zone 4a) Moderate season
151 days
Last Spring Frost May 5
151 growing days
First Fall Frost October 3

Crow Wing County Soil Profile

Soil Type

Silt Loam

Soil pH

6-6.7

Drainage

Well Drained

Thai Basil Planting Risk Windows

Early Start (70% safe) ✓ Fits season (12 days to spare)
Start indoors: Mar 4 Transplant: May 20 🍅 Harvest: Jul 15 – Sep 16
Recommended (50%) ✓ Fits season (11 days to spare)
Start indoors: Mar 10 Transplant: May 26 🍅 Harvest: Jul 21 – Sep 22
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 Crow Wing County

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

Soil pH

Your soil pH (6.0–6.7) is within Thai Basil's preferred range (6.0–7.0).

Soil Texture

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

Organic Matter

Organic matter is excellent (4.0%) — Thai Basil will thrive.

How to Plant Thai Basil

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

Succession Planting Thai Basil

3
successive plantings in your 151-day season

Sow every 5.7 weeks. Last sowing by Jul 20 to harvest before frost.

Thai Basil 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 103 gal / 100 sq ft

Monthly Watering Guide for Thai Basil

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

Month Thai Basil Needs Rainfall You Supplement Action
Jan 1.4" 0" ❄️ Dormant
Feb 1.6" 0" ❄️ Dormant
Mar 2.2" 0" ❄️ Dormant
Apr 3.3" 0" ❄️ Dormant
May 4.3" 3.3" 1" 💧 Light watering
Jun 4.3" 3.9" 0.4" 💧 Light watering
Jul 4.3" 4.2" 0.1" 💧 Light watering
Aug 4.3" 3.3" 1" 💧 Light watering
Sep 4.3" 3.2" 1.1" 💧 Light watering
Oct 4.3" 2.8" 1.5" 💧 Light watering
Nov 2.5" 0" ❄️ Dormant
Dec 1.7" 0" ❄️ Dormant

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

Thai 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.

Thai Basil needs ~531 GDD — county provides 1,283 GDD Excellent fit

Thai Basil Planting Timeline — Crow Wing County, MN

Thai Basil Planting Calendar

Activity When Date Range
Start Indoors March 10 Mar 10 – Mar 24
Transplant Outdoors May 26 May 26 – Jun 9
Direct Sow May 12 May 12 – Jun 2
Harvest July 21 Jul 21 – Sep 22

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

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

1"/week · Only during dry spells

📅 Days to Maturity

50–75 days

🧪 Soil pH

Needs 6–7 · Your soil: ideal

🗺️ USDA Zone

Zone 4a

📆 Growing Season

151 days in Crow Wing County

Growing Tips for Thai Basil in Crow Wing County

Direct sow Thai Basil outdoors after May 05 in Crow Wing County when soil has warmed and frost danger has passed.

General growing tips

Start seeds indoors or direct sow after last frost. Thai basil holds up better to heat in cooking than sweet basil. Pinch flowers to prolong leaf production.

Companion Planting

Good Companions

Avoid Planting Near

  • Rue
  • Sage

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Thai Basil in Crow Wing County, MN?

Crow Wing County is in Zone 4a with an average last frost of May 5. Plan your Thai Basil planting based on this frost date — see the calendar above for exact timing.

What planting zone is Crow Wing County, MN?

Crow Wing County, Minnesota is in USDA Hardiness Zone 4a. The average last spring frost is May 5 and first fall frost is October 3.

When should I plant Thai Basil in Crow Wing County, MN?

In Crow Wing County, MN, plant Thai Basil after the last frost (around May 5) and before the first frost (around October 3). Best results when soil holds above 50°F.

What growing zone is Crow Wing County, MN for Thai Basil?

Crow Wing County sits in USDA Zone 4a. Thai Basil grows reliably in zones 4a through 11b, so it's a good fit here.

Can Thai Basil grow in Crow Wing County's climate?

Yes — Thai Basil grows well in Crow Wing County's temperate climate. Crow Wing County averages a 151-day frost-free season, with last frost around May 5 and first frost around October 3.

🌱

Your Crow Wing County Garden Planner — Free

A 22-page printable planner built for Crow Wing 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 Crow Wing County, MN. Local conditions may vary. Last updated: August 2026.

Sources & credits

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