When to plant Arugula in McLean County, KY
For Arugula in McLean County, the safe spring window opens around March 23 and closes around April 13. Last expected frost is April 6, first fall frost October 31, giving a 208-day growing season. A second sowing from August 22 to September 5 extends the harvest into fall.
When to Plant Arugula in McLean County, KY
Your June gardening checklist
We've pulled the most time-sensitive tasks for McLean County, Kentucky this June and put them front and centre. Tackle them in order.
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It's harvest week for arugula
Don't tug. Use scissors or pruners for clean cuts — torn stems invite disease.
A few tasks this June that'll pay off in July
- First harvests: arugula
Arugula is a fast-growing cool-season green with a peppery, nutty flavor. It is excellent in salads and can be harvested as baby greens or mature leaves.
McLean County, Kentucky is in USDA Zone 7a. The average last spring frost is April 6 and the first fall frost is October 31, giving you a growing season of approximately 208 days.
At an elevation of 2,224 feet, McLean County receives approximately 41.1 inches of rainfall annually with predominantly silt loam soil. Summer highs average 85°F, providing good warmth for Arugula during the growing season.
McLean County Soil Profile
Soil Type
Silt Loam
Soil pH
5.4-6.6
Drainage
Well Drained
Arugula 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 McLean County
How your county's soil matches Arugula's growing requirements.
Soil pH
Your soil pH (5.4–6.6) overlaps with Arugula's range (6.0–7.0), though not a perfect match.
Soil Texture
The silt loam soil in McLean County is excellent for Arugula — good drainage, moisture retention, and nutrient holding capacity.
Drainage
Drainage is adequate for Arugula.
Organic Matter
Organic matter is moderate (2.6%). Annual compost additions will help Arugula.
How to Plant Arugula
Fall planting: Sow 10 weeks before your first frost date for a fall harvest.
Succession Planting Arugula
Sow every 3.4 weeks. Last sowing by Sep 11 to harvest before frost.
For a dedicated fall crop, sow by Aug 22.
Arugula Water Budget
Monthly Watering Guide for Arugula
Arugula 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 | Arugula Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 3.3" | 0" | ❄️ Dormant |
| Feb | — | 3.8" | 0" | ❄️ Dormant |
| Mar | — | 3.8" | 0" | ❄️ Dormant |
| Apr | 2.6" | 3.5" | 0" | ✅ Rainfall sufficient |
| May | 2.6" | 3.1" | 0" | ✅ Rainfall sufficient |
| Jun | 2.6" | 3.7" | 0" | ✅ Rainfall sufficient |
| Jul | 2.6" | 4.5" | 0" | ✅ Rainfall sufficient |
| Aug | 2.6" | 3.8" | 0" | ✅ Rainfall sufficient |
| Sep | 2.6" | 3.2" | 0" | ✅ Rainfall sufficient |
| Oct | 2.6" | 2.4" | 0.2" | 💧 Light watering |
| Nov | — | 3.1" | 0" | ❄️ Dormant |
| Dec | — | 2.9" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Apr–Oct in McLean County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Arugula 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.
Arugula Planting Timeline — McLean County, KY
Arugula Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 2 | Mar 2 – Mar 16 |
| Transplant Outdoors | April 6 | Apr 6 – Apr 20 |
| Direct Sow | March 23 | Mar 23 – Apr 13 |
| Harvest | May 11 | May 11 – Jul 13 |
| Fall Sowing | August 22 | Aug 22 – Sep 5 |
Plant 0.5" deep · 6" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Start Indoors Direct Sow |
| April | Transplant Outdoors Direct Sow |
| May | Harvest |
| June | Harvest |
| July | Harvest |
| August | Fall Sowing |
| September | Fall Sowing |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Partial Shade (3-6 hours)
💧 Water
0.6"/week · Natural rainfall sufficient
📅 Days to Maturity
30–50 days
🧪 Soil pH
Needs 6–7 · Your soil: acceptable
🗺️ USDA Zone
Zone 7a
📆 Growing Season
208 days in McLean County
Growing Tips for Arugula in McLean County
Direct sow Arugula outdoors after April 06 in McLean County when soil has warmed and frost danger has passed.
Your generous 208.0-day season in McLean County allows multiple plantings of Arugula. Sow every 15.0 days for continuous harvest.
Common pests for Arugula in this region include cabbage worm and flea beetles. Use row covers early in the season and inspect plants weekly.
General growing tips
Sow seeds directly every 2-3 weeks for continuous harvest. Provide afternoon shade in warm weather to prevent bolting. Harvest outer leaves first to extend production.
Companion Planting
Good Companions
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Check more plant combinations with our Companion Planting Checker →
Arugula in Other Locations
Frequently Asked Questions
When should I plant Arugula in McLean County, KY?
McLean County is in Zone 7a with an average last frost of April 6. Plan your Arugula planting based on this frost date — see the calendar above for exact timing.
What planting zone is McLean County, KY?
McLean County, Kentucky is in USDA Hardiness Zone 7a. The average last spring frost is April 6 and first fall frost is October 31.
When should I plant Arugula in McLean County, KY?
In McLean County, KY, plant Arugula after the last frost (around April 6) and before the first frost (around October 31). Best results when soil holds above 50°F.
What growing zone is McLean County, KY for Arugula?
McLean County sits in USDA Zone 7a. Arugula grows reliably in zones 3a through 11b, so it's a good fit here.
Can Arugula grow in McLean County's climate?
Yes — Arugula grows well in McLean County's temperate climate. McLean County averages a 208-day frost-free season, with last frost around April 6 and first frost around October 31.
Your McLean County Garden Planner — Free
A 22-page printable planner built for McLean County (Zone 7a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.