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When to plant Cumin in Rye, CO

Aim to plant Cumin in Rye on or after April 23; the window stays open through May 14. Rye's 153-day frost-free season gives you a single solid spring crop with a brief fall option. A second sowing from July 29 to August 12 extends the harvest into fall.

When to Plant Cumin in Rye, CO

Pueblo County, Colorado Zone 6a July

July in the garden — Pueblo County, Colorado

Your Pueblo County, Colorado garden is entering a new phase. Here's what's on the schedule for July and why each task matters now.

Avg. last frost May 7
Avg. first frost October 7
Soil temp (4") 67°F
Watering Critical
Pest pressure High
Daylight 14.4 hrs
  1. Direct-sow cumin for cool weather

    Fall crops get sweeter with a light frost. Don't be afraid of cool nights.

Before August arrives, get these ready
  • First harvests: cumin

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Cumin is a warm-season annual herb whose seeds are one of the most widely used spices globally. It requires a long, hot growing season of 3-4 months.

Rye, Colorado is in USDA Zone 6a. The average last spring frost is May 7 and the first fall frost is October 7, giving you a growing season of approximately 153 days.

At an elevation of 4,607 feet, Pueblo County receives approximately 14.1 inches of rainfall annually with predominantly loam soil. Summer highs average 88°F, providing good warmth for Cumin during the growing season. With low rainfall, drip irrigation is essential for growing Cumin successfully. Mulch heavily to conserve soil moisture.

Rye, CO (Zone 6a) Moderate season
153 days
Last Spring Frost May 7
153 growing days
First Fall Frost October 7

Rye Soil Profile

Soil Type

Loam

Soil pH

6.7-7.9

Drainage

Well Drained

Cumin Planting Risk Windows

Early Start (70% safe) ✗ May not fit
Start indoors: Mar 26 Transplant: Apr 23 🍅 Harvest: Aug 6 – Oct 8
Recommended (50%) ✗ May not fit
Start indoors: Apr 2 Transplant: Apr 30 🍅 Harvest: Aug 13 – Oct 15
Safe Start (90%) ✗ May not fit
Start indoors: Apr 15 Transplant: May 13 🍅 Harvest: Aug 26 – Oct 28

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 Rye

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

Soil pH

Your soil pH (6.7–7.9) is within Cumin's preferred range (6.0–8.0).

Soil Texture

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

Organic Matter

Organic matter is moderate (2.4%). Annual compost additions will help Cumin.

How to Plant Cumin

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

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

Cumin Water Budget

Plant needs
0.5″/week
Rainfall provides
0.4″/week
You supply
0.1″/week
Watering frequency Only during dry spells
Season total 185 gal / 100 sq ft
Drought risk

Water stress score is 8/10 — consider drought-tolerant varieties and mulching

Monthly Watering Guide for Cumin

Cumin 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 Cumin Needs Rainfall You Supplement Action
Jan 1.1" 0" ❄️ Dormant
Feb 0.8" 0" ❄️ Dormant
Mar 1.1" 0" ❄️ Dormant
Apr 1.5" 0" ❄️ Dormant
May 2.2" 1.5" 0.7" 💧 Light watering
Jun 2.2" 1.1" 1.1" 🚿 Regular watering
Jul 2.2" 1.1" 1.1" 🚿 Regular watering
Aug 2.2" 1.6" 0.6" 💧 Light watering
Sep 2.2" 1.3" 0.9" 💧 Light watering
Oct 2.2" 1.1" 1.1" 🚿 Regular watering
Nov 1.2" 0" ❄️ Dormant
Dec 0.8" 0" ❄️ Dormant

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

Cumin 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.

Cumin needs ~1,760 GDD — county provides 2,448 GDD Excellent fit

Cumin Planting Timeline — Rye, CO

Cumin Planting Calendar

Activity When Date Range
Start Indoors April 2 Apr 2 – Apr 16
Transplant Outdoors April 30 Apr 30 – May 14
Direct Sow April 23 Apr 23 – May 14
Harvest August 13 Aug 13 – Oct 15
Fall Sowing July 29 Jul 29 – Aug 12

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

Month-by-Month Timeline

MonthActivities
January
February
March
April Start Indoors Transplant Outdoors Direct Sow
May Transplant Outdoors Direct Sow
June
July Fall Sowing
August Fall Sowing Harvest
September Harvest
October Harvest
November
December

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

0.5"/week · Only during dry spells

📅 Days to Maturity

100–120 days

🧪 Soil pH

Needs 6–8 · Your soil: ideal

🗺️ USDA Zone

Zone 6a

📆 Growing Season

153 days in Pueblo County

Growing Tips for Cumin in Rye

Direct sow Cumin outdoors after May 07 in Pueblo County when soil has warmed and frost danger has passed.

Common pests for Cumin in this region include carrot rust fly and parsleyworm. Use row covers early in the season and inspect plants weekly.

Pueblo County receives only 14" of rain annually. Cumin needs consistent moisture — install drip irrigation or water deeply 2-3 times per week.

General growing tips

Start seeds indoors 4 weeks before last frost. Transplant after all danger of frost. Harvest when seed heads turn brown. Requires consistent warmth for proper seed development.

Companion Planting

Good Companions

Avoid Planting Near

  • Fennel

Check more plant combinations with our Companion Planting Checker →

When should I plant Cumin in Rye, CO?

In Rye, CO, plant Cumin after the last frost (around May 7) and before the first frost (around October 7). Best results when soil holds above 50°F.

What growing zone is Rye, CO for Cumin?

Rye sits in USDA Zone 6a. Cumin grows reliably in zones 5a through 11b, so it's a good fit here.

Can Cumin grow in Rye's climate?

Yes — Cumin grows well in Rye's temperate climate. Rye averages a 153-day frost-free season, with last frost around May 7 and first frost around October 7.

🌱

Your Pueblo County Garden Planner — Free

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