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When to plant Arugula in Bent County, CO

Bent County gardeners should plant Arugula between April 15 and May 6 in spring. With Bent County's Zone 6a climate (last frost April 29), Arugula needs 30–50 days to mature — plant by August 20 for a full harvest. A second sowing from July 31 to August 14 extends the harvest into fall.

When to Plant Arugula in Bent County, CO

Bent County, Colorado Zone 6a July

July to-do list for Bent County, Colorado

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

Avg. last frost April 29
Avg. first frost October 9
Soil temp (4") 68°F
Watering Critical
Pest pressure High
Daylight 14.4 hrs
  1. Basket week: arugula

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

  2. Sow arugula for an autumn harvest

    Keep young seedlings shaded and moist in summer heat. A row of taller crops works as natural shade.

August prep starts now
  • First harvests: arugula

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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.

Bent County, Colorado is in USDA Zone 6a. The average last spring frost is April 29 and the first fall frost is October 9, giving you a growing season of approximately 163 days.

At an elevation of 4,516 feet, Bent County receives approximately 12.4 inches of rainfall annually with predominantly loam soil. Summer highs average 87°F, providing good warmth for Arugula during the growing season. With low rainfall, drip irrigation is essential for growing Arugula successfully. Mulch heavily to conserve soil moisture.

Bent County, CO (Zone 6a) Moderate season
163 days
Last Spring Frost April 29
163 growing days
First Fall Frost October 9

Bent County Soil Profile

Soil Type

Loam

Soil pH

6.8-7.8

Drainage

Well Drained

Arugula Planting Risk Windows

Early Start (70% safe) ✓ Fits season (65 days to spare)
Start indoors: Mar 21 Transplant: Apr 25 🍅 Harvest: May 30 – Aug 1
Recommended (50%) ✓ Fits season (65 days to spare)
Start indoors: Mar 25 Transplant: Apr 29 🍅 Harvest: Jun 3 – Aug 5
Safe Start (90%) ✓ Fits season (66 days to spare)
Start indoors: Apr 7 Transplant: May 12 🍅 Harvest: Jun 16 – Aug 18

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 Bent County

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

Soil pH

Your soil pH (6.8–7.8) is more alkaline than Arugula prefers (6.0–7.0). Add sulfur or peat moss to lower pH.

Soil Texture

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

Organic Matter

Organic matter is moderate (2.5%). 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 163-day season

Sow every 3.4 weeks. Last sowing by Aug 20 to harvest before frost.

For a dedicated fall crop, sow by Jul 31.

Arugula Water Budget

Plant needs
0.6″/week
Rainfall provides
0.3″/week
You supply
0.3″/week
Watering frequency 1-2 times/week
Season total 488 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 0.9" 0" ❄️ Dormant
Feb 0.6" 0" ❄️ Dormant
Mar 1" 0" ❄️ Dormant
Apr 2.6" 1.4" 1.2" 💧 Light watering
May 2.6" 1.6" 1" 💧 Light watering
Jun 2.6" 0.9" 1.7" 🚿 Regular watering
Jul 2.6" 1" 1.6" 🚿 Regular watering
Aug 2.6" 1.4" 1.2" 💧 Light watering
Sep 2.6" 1" 1.6" 🚿 Regular watering
Oct 2.6" 1.1" 1.5" 🚿 Regular watering
Nov 0.8" 0" ❄️ Dormant
Dec 0.8" 0" ❄️ Dormant

Water needs are for active growing months only (Apr–Oct in Bent 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 ~610 GDD — county provides 2,485 GDD Excellent fit

Arugula Planting Timeline — Bent County, CO

Arugula Planting Calendar

Activity When Date Range
Start Indoors March 25 Mar 25 – Apr 8
Transplant Outdoors April 29 Apr 29 – May 13
Direct Sow April 15 Apr 15 – May 6
Harvest June 3 Jun 3 – Aug 5
Fall Sowing July 31 Jul 31 – Aug 14

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

Month-by-Month Timeline

MonthActivities
January
February
March Start Indoors
April Start Indoors Transplant Outdoors 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 · 1-2 times/week

📅 Days to Maturity

30–50 days

🧪 Soil pH

Needs 6–7 · Your soil: too_alkaline

🗺️ USDA Zone

Zone 6a

📆 Growing Season

163 days in Bent County

Growing Tips for Arugula in Bent County

Direct sow Arugula outdoors after April 29 in Bent County when soil has warmed and frost danger has passed.

Your generous 163.0-day season in Bent 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 Bent County, CO?

Bent County is in Zone 6a with an average last frost of April 29. Plan your Arugula planting based on this frost date — see the calendar above for exact timing.

What planting zone is Bent County, CO?

Bent County, Colorado is in USDA Hardiness Zone 6a. The average last spring frost is April 29 and first fall frost is October 9.

When should I plant Arugula in Bent County, CO?

In Bent County, CO, plant Arugula after the last frost (around April 29) and before the first frost (around October 9). Best results when soil holds above 50°F.

What growing zone is Bent County, CO for Arugula?

Bent 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 Bent County's climate?

Yes — Arugula grows well in Bent County's temperate climate. Bent County averages a 163-day frost-free season, with last frost around April 29 and first frost around October 9.

🌱

Your Bent County Garden Planner — Free

A 22-page printable planner built for Bent 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.

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

Sources & credits

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