When to plant Arugula in Madera County, CA
For Arugula in Madera County, the safe spring window opens around March 28 and closes around April 18. Last expected frost is April 18, first fall frost November 9, giving a 205-day growing season. A second sowing from September 14 to September 28 extends the harvest into fall.
When to Plant Arugula in Madera County, CA
Top priorities for Madera County, California gardeners in June
If you only do a handful of things in the garden this June, make it these. They're sequenced around your zone's frost timing.
-
Pick arugula
Check every 1–2 days. Many of these get tough or go to seed if you wait too long.
Before July arrives, get these ready
- 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.
Madera County, California is in USDA Zone 9a. The average last spring frost is April 18 and the first fall frost is November 9, giving you a growing season of approximately 205 days.
At an elevation of 187 feet, Madera County receives approximately 14.5 inches of rainfall annually with predominantly loam soil. Summer highs average 104°F, so Arugula may need afternoon shade and extra watering during peak heat. With low rainfall, drip irrigation is essential for growing Arugula successfully. Mulch heavily to conserve soil moisture.
Madera County Soil Profile
Soil Type
Loam
Soil pH
6.2-7.8
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 Madera County
How your county's soil matches Arugula's growing requirements.
Soil pH
Your soil pH (6.2–7.8) overlaps with Arugula's range (6.0–7.0), though not a perfect match.
Soil Texture
The loam soil in Madera County is excellent for Arugula — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is moderate (2.6%). Annual compost additions will help Arugula.
How to Plant Arugula
Fall planting: Sow 8 weeks before your first frost date for a fall harvest.
Succession Planting Arugula
Sow every 3.4 weeks. Last sowing by Sep 20 to harvest before frost.
For a dedicated fall crop, sow by Sep 14.
Arugula Water Budget
Water stress score is 8/10 — consider drought-tolerant varieties and mulching
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 | — | 2.6" | 0" | ❄️ Dormant |
| Feb | — | 2.9" | 0" | ❄️ Dormant |
| Mar | — | 2.3" | 0" | ❄️ Dormant |
| Apr | 2.6" | 1.3" | 1.3" | 🚿 Regular watering |
| May | 2.6" | 0.4" | 2.2" | 🚿 Regular watering |
| Jun | 2.6" | 0.1" | 2.5" | 🚿 Regular watering |
| Jul | 2.6" | 0" | 2.6" | 🚿 Regular watering |
| Aug | 2.6" | 0" | 2.6" | 🚿 Regular watering |
| Sep | 2.6" | 0.1" | 2.5" | 🚿 Regular watering |
| Oct | 2.6" | 0.7" | 1.9" | 🚿 Regular watering |
| Nov | 2.6" | 1.4" | 1.2" | 💧 Light watering |
| Dec | — | 2.7" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Apr–Nov in Madera 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 — Madera County, CA
Arugula Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 21 | Mar 21 – Apr 4 |
| Transplant Outdoors | April 18 | Apr 18 – May 2 |
| Direct Sow | March 28 | Mar 28 – Apr 18 |
| Harvest | May 23 | May 23 – Jul 25 |
| Fall Sowing | September 14 | Sep 14 – Sep 28 |
Plant 0.5" deep · 6" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Start Indoors Direct Sow |
| April | Start Indoors Transplant Outdoors Direct Sow |
| May | Transplant Outdoors Harvest |
| June | Harvest |
| July | Harvest |
| August | — |
| September | Fall Sowing |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Partial Shade (3-6 hours)
💧 Water
0.6"/week · 1-2 times/week
📅 Days to Maturity
30–50 days
🧪 Soil pH
Needs 6–7 · Your soil: acceptable
🗺️ USDA Zone
Zone 9a
📆 Growing Season
205 days in Madera County
Growing Tips for Arugula in Madera County
Direct sow Arugula outdoors after April 18 in Madera County when soil has warmed and frost danger has passed.
Summer highs in Madera County reach 104°F — grow Arugula as a spring or fall crop. Use shade cloth if planting in summer.
Your generous 205.0-day season in Madera 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
Frequently Asked Questions
When should I plant Arugula in Madera County, CA?
Madera County is in Zone 9a with an average last frost of April 18. Plan your Arugula planting based on this frost date — see the calendar above for exact timing.
What planting zone is Madera County, CA?
Madera County, California is in USDA Hardiness Zone 9a. The average last spring frost is April 18 and first fall frost is November 9.
When should I plant Arugula in Madera County, CA?
In Madera County, CA, plant Arugula after the last frost (around April 18) and before the first frost (around November 9). Best results when soil holds above 50°F.
What growing zone is Madera County, CA for Arugula?
Madera County sits in USDA Zone 9a. Arugula grows reliably in zones 3a through 11b, so it's a good fit here.
Can Arugula grow in Madera County's climate?
Yes — Arugula grows well in Madera County's temperate climate. Madera County averages a 205-day frost-free season, with last frost around April 18 and first frost around November 9.
Your Madera County Garden Planner — Free
A 22-page printable planner built for Madera County (Zone 9a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.