Blog

When to plant Arugula in Kit Carson County, CO

For Kit Carson County, gardeners: plant Arugula April 25 through May 16 once soil reads 50°F. A second sowing from July 30 to August 13 extends the harvest into fall.

When to Plant Arugula in Kit Carson County, CO

Kit Carson County, Colorado Zone 6a August

What to do in August

We've pulled the most time-sensitive tasks for Kit Carson County, Colorado this August and put them front and centre. Tackle them in order.

Avg. last frost May 9
Avg. first frost October 8
Soil temp (4") 61°F
Watering High
Pest pressure High
Daylight 13.5 hrs
  1. Collect arugula at their peak

    Taste as you pick. The first ripe produce is the best feedback loop you'll get all season.

Instant PDF download. No spam, unsubscribe any time.

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.

Kit Carson County, Colorado is in USDA Zone 6a. The average last spring frost is May 9 and the first fall frost is October 8, giving you a growing season of approximately 152 days.

At an elevation of 6,382 feet, Kit Carson County receives approximately 23.2 inches of rainfall annually with predominantly loam soil. Summer highs average 85°F, providing good warmth for Arugula during the growing season.

Kit Carson County, CO (Zone 6a) Moderate season
152 days
Last Spring Frost May 9
152 growing days
First Fall Frost October 8

Kit Carson County Soil Profile

Soil Type

Loam

Soil pH

6.4-8

Drainage

Well Drained

Arugula Planting Risk Windows

Early Start (70% safe) ✓ Fits season (58 days to spare)
Start indoors: Mar 27 Transplant: May 1 🍅 Harvest: Jun 5 – Aug 7
Recommended (50%) ✓ Fits season (54 days to spare)
Start indoors: Apr 4 Transplant: May 9 🍅 Harvest: Jun 13 – Aug 15
Safe Start (90%) ✓ Fits season (58 days to spare)
Start indoors: Apr 15 Transplant: May 20 🍅 Harvest: Jun 24 – Aug 26

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 Kit Carson County

How your county's soil matches Arugula's growing requirements.

Soil pH

Your soil pH (6.4–8.0) is more alkaline than Arugula prefers (6.0–7.0). Add sulfur or peat moss to lower pH.

Soil Texture

The loam soil in Kit Carson County is excellent for Arugula — good drainage, moisture retention, and nutrient holding capacity.

Organic Matter

Organic matter is moderate (2.3%). Annual compost additions will help Arugula.

How to Plant Arugula

0.5"
Planting Depth
6"
Between Plants
12"
Between Rows

Fall planting: Sow 10 weeks before your first frost date for a fall harvest.

Succession Planting Arugula

6
successive plantings in your 152-day season

Sow every 3.4 weeks. Last sowing by Aug 19 to harvest before frost.

For a dedicated fall crop, sow by Jul 30.

Arugula Water Budget

Plant needs
0.6″/week
Rainfall provides
0.6″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft
Drought risk

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 1.5" 0" ❄️ Dormant
Feb 1.4" 0" ❄️ Dormant
Mar 2.2" 0" ❄️ Dormant
Apr 2.4" 0" ❄️ Dormant
May 2.6" 2.8" 0" ✅ Rainfall sufficient
Jun 2.6" 1.4" 1.2" 💧 Light watering
Jul 2.6" 2.2" 0.4" 💧 Light watering
Aug 2.6" 2.7" 0" ✅ Rainfall sufficient
Sep 2.6" 1.9" 0.7" 💧 Light watering
Oct 2.6" 1.9" 0.7" 💧 Light watering
Nov 1.5" 0" ❄️ Dormant
Dec 1.3" 0" ❄️ Dormant

Water needs are for active growing months only (May–Oct in Kit Carson 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 needs ~550 GDD — county provides 2,090 GDD Excellent fit

Arugula Planting Timeline — Kit Carson County, CO

Arugula Planting Calendar

Activity When Date Range
Start Indoors April 4 Apr 4 – Apr 18
Transplant Outdoors May 9 May 9 – May 23
Direct Sow April 25 Apr 25 – May 16
Harvest June 13 Jun 13 – Aug 15
Fall Sowing July 30 Jul 30 – Aug 13

Plant 0.5" deep · 6" apart · Rows 12" apart

Month-by-Month Timeline

MonthActivities
January
February
March
April Start Indoors Direct Sow
May Transplant Outdoors Direct Sow
June Harvest
July Fall Sowing 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: too_alkaline

🗺️ USDA Zone

Zone 6a

📆 Growing Season

152 days in Kit Carson County

Growing Tips for Arugula in Kit Carson County

Direct sow Arugula outdoors after May 09 in Kit Carson County when soil has warmed and frost danger has passed.

Your generous 152.0-day season in Kit Carson 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

  • Strawberries

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Arugula in Kit Carson County, CO?

Kit Carson County is in Zone 6a with an average last frost of May 9. Plan your Arugula planting based on this frost date — see the calendar above for exact timing.

What planting zone is Kit Carson County, CO?

Kit Carson County, Colorado is in USDA Hardiness Zone 6a. The average last spring frost is May 9 and first fall frost is October 8.

When should I plant Arugula in Kit Carson County, CO?

In Kit Carson County, CO, plant Arugula after the last frost (around May 9) and before the first frost (around October 8). Best results when soil holds above 50°F.

What growing zone is Kit Carson County, CO for Arugula?

Kit Carson County sits in USDA Zone 6a. Arugula grows reliably in zones 3a through 11b, so it's a good fit here.

Can Arugula grow in Kit Carson County's climate?

Yes — Arugula grows well in Kit Carson County's temperate climate. Kit Carson County averages a 152-day frost-free season, with last frost around May 9 and first frost around October 8.

🌱

Your Kit Carson County Garden Planner — Free

A 22-page printable planner built for Kit Carson 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.

Instant PDF download. No spam, unsubscribe any time.

Data sources: USDA Plant Hardiness Zone Map (2023), NOAA 30-Year Climate Normals. Frost dates are based on 50% probability averages for Kit Carson County, CO. Local conditions may vary. Last updated: August 2026.

Sources & credits

Every number on this page traces back to a primary horticulture or government data source. Click through to verify.