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When to plant Rue in Cheyenne County, CO

Plant Rue in Cheyenne County during the brief May 9–May 23 window. With 162 frost-free days, fall plantings can't mature before October 11.

When to Plant Rue in Cheyenne County, CO

Cheyenne County, Colorado Zone 6a June

Cheyenne County, Colorado gardeners: here's your June plan

June is a pivotal month for Cheyenne County, Colorado gardens. Focus on these tasks first and you'll set up the rest of the season for success.

Avg. last frost May 2
Avg. first frost October 11
Soil temp (4") 47°F
Watering High
Pest pressure High
Daylight 14.7 hrs
Get ahead of July
  • First harvests: rue

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Rue is a bitter, aromatic perennial herb with bluish-green foliage used historically in medicine and as a pest deterrent. Handle with care as its sap can cause skin irritation.

Cheyenne County, Colorado is in USDA Zone 6a. The average last spring frost is May 2 and the first fall frost is October 11, giving you a growing season of approximately 162 days.

At an elevation of 7,824 feet, Cheyenne County receives approximately 21.3 inches of rainfall annually with predominantly loam soil. Summer highs average 86°F, providing good warmth for Rue during the growing season.

Cheyenne County, CO (Zone 6a) Moderate season
162 days
Last Spring Frost May 2
162 growing days
First Fall Frost October 11

Cheyenne County Soil Profile

Soil Type

Loam

Soil pH

6.8-7.8

Drainage

Well Drained

Rue Planting Risk Windows

Early Start (70% safe) ✓ Fits season (22 days to spare)
Transplant: May 3 🍅 Harvest: Jul 12 – Sep 13
Recommended (50%) ✓ Fits season (22 days to spare)
Transplant: May 9 🍅 Harvest: Jul 18 – Sep 19
Safe Start (90%) ✓ Fits season (22 days to spare)
Transplant: May 23 🍅 Harvest: Aug 1 – Oct 3

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 Cheyenne County

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

Soil pH

Your soil pH (6.8–7.8) overlaps with Rue's range (6.0–7.5), though not a perfect match.

Soil Texture

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

Drainage

Drainage is adequate for Rue.

Organic Matter

Organic matter is moderate (2.5%). Annual compost additions will help Rue.

How to Plant Rue

0.5"
Planting Depth
8"
Between Plants
12"
Between Rows

Succession Planting Rue

2
successive plantings in your 162-day season

Sow every 8 weeks. Last sowing by Jul 13 to harvest before frost.

Rue Water Budget

Plant needs
0.5″/week
Rainfall provides
0.6″/week
You supply
0.1″/week
Watering frequency Only during dry spells
Season total 169 gal / 100 sq ft
Drought risk

Water stress score is 10/10 — consider drought-tolerant varieties and mulching

Monthly Watering Guide for Rue

Rue needs approximately 0.5 inches of water per week (2.2" per month). Here's how your county's rainfall compares month by month.

Month Rue Needs Rainfall You Supplement Action
Jan 1.6" 0" ❄️ Dormant
Feb 1.4" 0" ❄️ Dormant
Mar 1.9" 0" ❄️ Dormant
Apr 1.9" 0" ❄️ Dormant
May 2.2" 2.6" 0" ✅ Rainfall sufficient
Jun 2.2" 1.6" 0.6" 💧 Light watering
Jul 2.2" 1.6" 0.6" 💧 Light watering
Aug 2.2" 2.2" 0" ✅ Rainfall sufficient
Sep 2.2" 1.6" 0.6" 💧 Light watering
Oct 2.2" 2.1" 0.1" 💧 Light watering
Nov 1.6" 0" ❄️ Dormant
Dec 1.3" 0" ❄️ Dormant

Water needs are for active growing months only (May–Oct in Cheyenne County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.

Rue 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.

Rue needs ~1,160 GDD — county provides 2,349 GDD Excellent fit

Rue Planting Timeline — Cheyenne County, CO

Rue Planting Calendar

Activity When Date Range
Transplant Outdoors May 9 May 9 – May 23
Harvest July 18 Jul 18 – Sep 19

Plant 0.5" deep · 8" apart · Rows 12" apart

Month-by-Month Timeline

MonthActivities
January
February
March
April
May Transplant Outdoors
June
July Harvest
August Harvest
September Harvest
October
November
December

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

0.5"/week · Only during dry spells

📅 Days to Maturity

70–90 days

🧪 Soil pH

Needs 6–7.5 · Your soil: acceptable

🗺️ USDA Zone

Zone 6a

📆 Growing Season

162 days in Cheyenne County

Growing Tips for Rue in Cheyenne County

Direct sow Rue outdoors after May 02 in Cheyenne County when soil has warmed and frost danger has passed.

Cheyenne County receives only 21" of rain annually. Rue needs consistent moisture — install drip irrigation or water deeply 2-3 times per week.

General growing tips

Start seeds indoors or direct sow. Plant in well-drained soil. Wear gloves when handling as sap can cause phytophotodermatitis. Prune in early spring.

Companion Planting

Good Companions

Avoid Planting Near

  • Basil
  • Sage

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Rue in Cheyenne County, CO?

Cheyenne County is in Zone 6a with an average last frost of May 2. Plan your Rue planting based on this frost date — see the calendar above for exact timing.

What planting zone is Cheyenne County, CO?

Cheyenne County, Colorado is in USDA Hardiness Zone 6a. The average last spring frost is May 2 and first fall frost is October 11.

When should I plant Rue in Cheyenne County, CO?

In Cheyenne County, CO, plant Rue after the last frost (around May 2) and before the first frost (around October 11). Best results when soil holds above 50°F.

What growing zone is Cheyenne County, CO for Rue?

Cheyenne County sits in USDA Zone 6a. Rue grows reliably in zones 4a through 9b, so it's a good fit here.

Can Rue grow in Cheyenne County's climate?

Yes — Rue grows well in Cheyenne County's temperate climate. Cheyenne County averages a 162-day frost-free season, with last frost around May 2 and first frost around October 11.

🌱

Your Cheyenne County Garden Planner — Free

A 22-page printable planner built for Cheyenne 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 Cheyenne County, CO. Local conditions may vary. Last updated: June 2026.

Sources & credits

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