When to plant Basil in Martin County, MN
In Martin County, plant Basil in spring between May 4 and May 25, once soil temps hold above 50°F. Martin County's last frost averages April 27, so time plantings around the expected last-frost window for best survival. For a fall crop, sow between and — roughly 50–75 days before the first frost on October 8.
When to Plant Basil in Martin County, MN
Top priorities for Martin County, Minnesota gardeners in August
Welcome to August in Zone 5a. These are the moves that will have the biggest impact on your growing season.
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Harvest basil as they ripen
This is the payoff month. Bring a basket, bring a friend, and get into the beds.
Before September arrives, get these ready
- First harvests: basil
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.
Martin County, Minnesota is in USDA Zone 5a. The average last spring frost is April 27 and the first fall frost is October 8, giving you a growing season of approximately 164 days.
At an elevation of 984 feet, Martin County receives approximately 34.8 inches of rainfall annually with predominantly silt loam soil. Summer highs average 83°F, so choose short-season varieties of Basil to ensure they mature before fall.
Martin County Soil Profile
Soil Type
Silt Loam
Soil pH
5.9-6.9
Drainage
Well Drained
Basil Planting Risk Windows
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 Martin County
How your county's soil matches Basil's growing requirements.
Soil pH
Your soil pH (5.9–6.9) overlaps with Basil's range (6.0–7.0), though not a perfect match.
Soil Texture
The silt loam soil in Martin County is excellent for Basil — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is excellent (4.7%) — Basil will thrive.
How to Plant Basil
Succession Planting Basil
Sow every 5.7 weeks. Last sowing by Jul 25 to harvest before frost.
Basil Water Budget
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 | — | 1.5" | 0" | ❄️ Dormant |
| Feb | — | 1.5" | 0" | ❄️ Dormant |
| Mar | — | 2.5" | 0" | ❄️ Dormant |
| Apr | 2.6" | 3.3" | 0" | ✅ Rainfall sufficient |
| May | 2.6" | 3.9" | 0" | ✅ Rainfall sufficient |
| Jun | 2.6" | 4.2" | 0" | ✅ Rainfall sufficient |
| Jul | 2.6" | 3.8" | 0" | ✅ Rainfall sufficient |
| Aug | 2.6" | 4.1" | 0" | ✅ Rainfall sufficient |
| Sep | 2.6" | 2.9" | 0" | ✅ Rainfall sufficient |
| Oct | 2.6" | 2.9" | 0" | ✅ Rainfall sufficient |
| Nov | — | 2.4" | 0" | ❄️ Dormant |
| Dec | — | 1.9" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Apr–Oct in Martin 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 Planting Timeline — Martin County, MN
Basil Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 9 | Mar 9 – Mar 23 |
| Transplant Outdoors | May 11 | May 11 – May 25 |
| Direct Sow | May 4 | May 4 – May 25 |
| Harvest | July 6 | Jul 6 – Sep 7 |
Plant 0.5" deep · 8" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Start Indoors |
| April | — |
| May | Transplant Outdoors Direct Sow |
| June | — |
| July | Harvest |
| August | Harvest |
| September | Harvest |
| October | — |
| November | — |
| December | — |
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 5a
📆 Growing Season
164 days in Martin County
Growing Tips for Basil in Martin County
Direct sow Basil outdoors after April 27 in Martin 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
Check more plant combinations with our Companion Planting Checker →
Isolate 150 ft between varieties. Different basil species can cross.
Basil in Other Locations
Frequently Asked Questions
When should I plant Basil in Martin County, MN?
Martin County is in Zone 5a with an average last frost of April 27. Plan your Basil planting based on this frost date — see the calendar above for exact timing.
What planting zone is Martin County, MN?
Martin County, Minnesota is in USDA Hardiness Zone 5a. The average last spring frost is April 27 and first fall frost is October 8.
When should I plant Basil in Martin County, MN?
In Martin County, MN, plant Basil after the last frost (around April 27) and before the first frost (around October 8). Best results when soil holds above 50°F.
What growing zone is Martin County, MN for Basil?
Martin County sits in USDA Zone 5a. Basil grows reliably in zones 4a through 11b, so it's a good fit here.
Can Basil grow in Martin County's climate?
Yes — Basil grows well in Martin County's temperate climate. Martin County averages a 164-day frost-free season, with last frost around April 27 and first frost around October 8.
Your Martin County Garden Planner — Free
A 22-page printable planner built for Martin County (Zone 5a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.