When to plant Basil in Kossuth County County,
Kossuth County County gardeners should plant Basil between May 4 and May 25 in spring. With Kossuth County County's Zone 5a climate (last frost April 27), Basil needs 75 days to mature — plant by July 23 for a full harvest.
When to Plant Basil in Kossuth County, IA
What to do in June
Welcome to June in Zone 5a. These are the moves that will have the biggest impact on your growing season.
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Time to start basil inside
Your window is short. These crops want several weeks of indoor growth before they go outside.
To set up a strong July, finish these tasks
- 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.
Kossuth County, Iowa is in USDA Zone 5a. The average last spring frost is April 27 and the first fall frost is October 6, giving you a growing season of approximately 162 days.
At an elevation of 1,213 feet, Kossuth County receives approximately 36.5 inches of rainfall annually with predominantly silt loam soil. Summer highs average 80°F, so choose short-season varieties of Basil to ensure they mature before fall.
Kossuth County Soil Profile
Soil Type
Silt Loam
Soil pH
6.2-7
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 Kossuth County
How your county's soil matches Basil's growing requirements.
Soil pH
Your soil pH (6.2–7.0) is within Basil's preferred range (6.0–7.0).
Soil Texture
The silt loam soil in Kossuth County is excellent for Basil — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is excellent (4.9%) — Basil will thrive.
How to Plant Basil
Succession Planting Basil
Sow every 5.7 weeks. Last sowing by Jul 23 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 | — | 1.7" | 0" | ❄️ Dormant |
| Feb | — | 1.4" | 0" | ❄️ Dormant |
| Mar | — | 2.4" | 0" | ❄️ Dormant |
| Apr | 2.6" | 3.8" | 0" | ✅ Rainfall sufficient |
| May | 2.6" | 3.7" | 0" | ✅ Rainfall sufficient |
| Jun | 2.6" | 5.1" | 0" | ✅ Rainfall sufficient |
| Jul | 2.6" | 4.3" | 0" | ✅ Rainfall sufficient |
| Aug | 2.6" | 3.7" | 0" | ✅ Rainfall sufficient |
| Sep | 2.6" | 2.9" | 0" | ✅ Rainfall sufficient |
| Oct | 2.6" | 3.2" | 0" | ✅ Rainfall sufficient |
| Nov | — | 2.5" | 0" | ❄️ Dormant |
| Dec | — | 1.8" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Apr–Oct in Kossuth 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 — Kossuth County, IA
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: ideal
🗺️ USDA Zone
Zone 5a
📆 Growing Season
162 days in Kossuth County
Growing Tips for Basil in Kossuth County
Direct sow Basil outdoors after April 27 in Kossuth 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 Kossuth County, IA?
Kossuth 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 Kossuth County, IA?
Kossuth County, Iowa is in USDA Hardiness Zone 5a. The average last spring frost is April 27 and first fall frost is October 6.
When should I plant Basil in Kossuth County, ?
In Kossuth County, , plant Basil after the last frost (around April 27) and before the first frost (around October 6). Best results when soil holds above 50°F.
What growing zone is Kossuth County, for Basil?
Kossuth 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 Kossuth County's climate?
Yes — Basil grows well in Kossuth County's temperate climate. Kossuth County averages a 162-day frost-free season, with last frost around April 27 and first frost around October 6.
Your Kossuth County Garden Planner — Free
A 22-page printable planner built for Kossuth 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.