When to plant Arugula in Ithaca, MI
Ithaca gardeners should plant Arugula between April 16 and May 7 in spring. With Ithaca's Zone 6a climate (last frost April 30), Arugula needs 30–50 days to mature — plant by August 27 for a full harvest. A second sowing from August 7 to August 21 extends the harvest into fall.
When to Plant Arugula in Ithaca, MI
Your August planting checklist for Gratiot County, Michigan
Each item below is timed to Gratiot County, Michigan's frost dates and soil temperatures. Skip nothing, stress about nothing.
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Bring in the arugula
Morning harvests are best — cooler temperatures mean crisper produce and longer fridge life.
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Kick off the fall garden with arugula
Fall crops get sweeter with a light frost. Don't be afraid of cool nights.
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.
Ithaca, Michigan is in USDA Zone 6a. The average last spring frost is April 30 and the first fall frost is October 16, giving you a growing season of approximately 169 days.
At an elevation of 1,055 feet, Gratiot County receives approximately 38.8 inches of rainfall annually with predominantly silt loam soil. Summer highs average 83°F, so choose short-season varieties of Arugula to ensure they mature before fall.
Ithaca Soil Profile
Soil Type
Silt Loam
Soil pH
6.2-6.8
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 Ithaca
How your county's soil matches Arugula's growing requirements.
Soil pH
Your soil pH (6.2–6.8) is within Arugula's preferred range (6.0–7.0).
Soil Texture
The silt loam soil in Gratiot County is excellent for Arugula — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is excellent (4.7%) — Arugula will thrive.
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 Aug 27 to harvest before frost.
For a dedicated fall crop, sow by Aug 07.
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 | — | 1.8" | 0" | ❄️ Dormant |
| Feb | — | 1.7" | 0" | ❄️ Dormant |
| Mar | — | 2.4" | 0" | ❄️ Dormant |
| Apr | 2.6" | 3.9" | 0" | ✅ Rainfall sufficient |
| May | 2.6" | 3.9" | 0" | ✅ Rainfall sufficient |
| Jun | 2.6" | 5.3" | 0" | ✅ Rainfall sufficient |
| Jul | 2.6" | 3.7" | 0" | ✅ Rainfall sufficient |
| Aug | 2.6" | 4.4" | 0" | ✅ Rainfall sufficient |
| Sep | 2.6" | 3.7" | 0" | ✅ Rainfall sufficient |
| Oct | 2.6" | 2.8" | 0" | ✅ Rainfall sufficient |
| Nov | — | 3" | 0" | ❄️ Dormant |
| Dec | — | 2.3" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Apr–Oct in Gratiot 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 — Ithaca, MI
Arugula Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 26 | Mar 26 – Apr 9 |
| Transplant Outdoors | April 30 | Apr 30 – May 14 |
| Direct Sow | April 16 | Apr 16 – May 7 |
| Harvest | June 4 | Jun 4 – Aug 6 |
| Fall Sowing | August 7 | Aug 7 – Aug 21 |
Plant 0.5" deep · 6" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Start Indoors |
| April | Start Indoors Transplant Outdoors Direct Sow |
| May | Transplant Outdoors Direct Sow |
| June | Harvest |
| July | Harvest |
| August | Fall Sowing Harvest |
| September | — |
| 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: ideal
🗺️ USDA Zone
Zone 6a
📆 Growing Season
169 days in Gratiot County
Growing Tips for Arugula in Ithaca
Direct sow Arugula outdoors after April 30 in Gratiot County when soil has warmed and frost danger has passed.
Your generous 169.0-day season in Gratiot 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
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Arugula in Other Locations
When should I plant Arugula in Ithaca, MI?
In Ithaca, MI, plant Arugula after the last frost (around April 30) and before the first frost (around October 16). Best results when soil holds above 50°F.
What growing zone is Ithaca, MI for Arugula?
Ithaca sits in USDA Zone 6a. Arugula grows reliably in zones 3a through 11b, so it's a good fit here.
Can Arugula grow in Ithaca's climate?
Yes — Arugula grows well in Ithaca's temperate climate. Ithaca averages a 169-day frost-free season, with last frost around April 30 and first frost around October 16.
Your Gratiot County Garden Planner — Free
A 22-page printable planner built for Gratiot County (Zone 6a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.