Blog

When to Plant Tomatillo in Cheyenne County, KS

Tomatillos are a Mexican staple that produces tart, green fruits enclosed in papery husks. They are essential for salsa verde and green sauces.

Cheyenne County, Kansas is in USDA Zone 5b. The average last spring frost is May 4 and the first fall frost is October 9, giving you a growing season of approximately 158 days.

At an elevation of 967 feet, Cheyenne County receives approximately 24.3 inches of rainfall annually with predominantly loam soil. Summer highs average 86ยฐF, providing good warmth for Tomatillo during the growing season.

Cheyenne County, KS (Zone 5b) Moderate season
158 days
Last Spring Frost May 4
158 growing days
First Fall Frost October 9

Cheyenne County Soil Profile

Soil Type

Loam

Soil pH

6.3-7.2

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (11 days to spare)
Start indoors: Mar 5 Transplant: May 14 🍅 Harvest: Jul 16 – Sep 24
Recommended (50%) ✓ Fits season (11 days to spare)
Start indoors: Mar 9 Transplant: May 18 🍅 Harvest: Jul 20 – Sep 28
Safe Start (90%) ✓ Fits season (7 days to spare)
Start indoors: Mar 26 Transplant: Jun 4 🍅 Harvest: Aug 6 – Oct 15

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 Tomatillo's growing requirements.

Soil pH

Your soil pH (6.3โ€“7.2) overlaps with Tomatillo's range (6.0โ€“7.0), though not a perfect match.

Soil Texture

The loam soil in Cheyenne County is excellent for Tomatillo โ€” good drainage, moisture retention, and nutrient holding capacity.

Drainage

Drainage is adequate for Tomatillo.

Organic Matter

Organic matter is moderate (3.5%). Annual compost additions will help Tomatillo.

How to Plant Tomatillo

1"
Planting Depth
15"
Between Plants
24"
Between Rows

Succession Planting Tomatillo

3
successive plantings in your 158-day season

Sow every 6.9 weeks. Last sowing by Jul 16 to harvest before frost.

Plant Water Budget

Plant needs
1.1″/week
Rainfall provides
0.7″/week
You supply
0.9″/week
Watering frequency 2-3 times/week
Season total 1,323 gal / 100 sq ft
Drought risk

Water stress score is 8/10 โ€” consider drought-tolerant varieties and mulching

Monthly Watering Guide for Tomatillo

Tomatillo needs approximately 1.1 inches of water per week (4.8" per month). Here's how your county's rainfall compares month by month.

Month Tomatillo Needs Rainfall You Supplement Action
Jan โ€” 1.7" 0" โ„๏ธ Dormant
Feb โ€” 1.5" 0" โ„๏ธ Dormant
Mar โ€” 2.1" 0" โ„๏ธ Dormant
Apr โ€” 2.4" 0" โ„๏ธ Dormant
May 4.8" 2.6" 2.2" ๐Ÿ’ง Light watering
Jun 4.8" 1.7" 3.1" ๐Ÿšฟ Regular watering
Jul 4.8" 2.4" 2.4" ๐Ÿšฟ Regular watering
Aug 4.8" 2.5" 2.3" ๐Ÿ’ง Light watering
Sep 4.8" 2" 2.8" ๐Ÿšฟ Regular watering
Oct 4.8" 2.3" 2.5" ๐Ÿšฟ Regular watering
Nov โ€” 1.7" 0" โ„๏ธ Dormant
Dec โ€” 1.3" 0" โ„๏ธ Dormant

Water needs are for active growing months only (Mayโ€“Oct in Cheyenne County). Supplement amounts are based on average rainfall โ€” actual needs vary with temperature, soil, and mulching.

Tomatillo 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" โ€” every day above 50ยฐF 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.

Tomatillo needs ~1,051 GDD — county provides 2,291 GDD Excellent fit

Tomatillo Planting Timeline โ€” Cheyenne County, KS

Tomatillo Planting Calendar

Activity When Date Range
Start Indoors March 9 Mar 9 โ€“ Mar 23
Transplant Outdoors May 18 May 18 โ€“ Jun 1
Direct Sow May 11 May 11 โ€“ Jun 1
Harvest July 20 Jul 20 โ€“ Sep 28

Plant 1" deep ยท 15" apart ยท Rows 24" apart

Month-by-Month Timeline

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

Growing Conditions

โ˜€๏ธ Sun

Full Sun (6-8+ hours)

๐Ÿ’ง Water

1.1"/week ยท 2-3 times/week

๐Ÿ“… Days to Maturity

60โ€“85 days

๐Ÿงช Soil pH

Needs 6โ€“7 ยท Your soil: acceptable

๐Ÿ—บ๏ธ USDA Zone

Zone 5b

๐Ÿ“† Growing Season

158 days in Cheyenne County

Growing Tips for Tomatillo in Cheyenne County

Direct sow Tomatillo outdoors after May 04 in Cheyenne County when soil has warmed and frost danger has passed.

Common pests for Tomatillo in this region include tomato hornworm and aphids. Use row covers early in the season and inspect plants weekly.

Cheyenne County receives only 24" of rain annually. Tomatillo needs consistent moisture โ€” install drip irrigation or water deeply 2-3 times per week.

General growing tips

Start seeds indoors 6-8 weeks before last frost. Plant at least two plants for cross-pollination. Harvest when fruits fill the husk and it begins to split.

Companion Planting

Good Companions

Avoid Planting Near

  • Fennel
  • Dill

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Tomatillo in Cheyenne County, KS?

Cheyenne County is in Zone 5b with an average last frost of May 4. Plan your Tomatillo planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Cheyenne County, KS?

Cheyenne County, Kansas is in USDA Hardiness Zone 5b. The average last spring frost is May 4 and first fall frost is October 9.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Cheyenne County gardeners in Zone 5b organize planting dates, track what's growing, and never miss a planting window.

Get Your Free Garden Planner →

Free download. Plan your entire garden season in minutes.

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