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When to Plant Tomatillo in Gooding County, ID

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

Gooding County, Idaho is in USDA Zone 5b. The average last spring frost is May 3 and the first fall frost is October 3, giving you a growing season of approximately 153 days.

At an elevation of 5,631 feet, Gooding County receives approximately 16.6 inches of rainfall annually with predominantly loam soil. Summer highs average 87ยฐF, providing good warmth for Tomatillo during the growing season. With low rainfall, drip irrigation is essential for growing Tomatillo successfully. Mulch heavily to conserve soil moisture.

Gooding County, ID (Zone 5b) Moderate season
153 days
Last Spring Frost May 3
153 growing days
First Fall Frost October 3

Gooding County Soil Profile

Soil Type

Loam

Soil pH

6.5-8.2

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (4 days to spare)
Start indoors: Mar 4 Transplant: May 13 🍅 Harvest: Jul 15 – Sep 23
Recommended (50%) ✓ Fits season (6 days to spare)
Start indoors: Mar 8 Transplant: May 17 🍅 Harvest: Jul 19 – Sep 27
Safe Start (90%) ✗ May not fit
Start indoors: Apr 6 Transplant: Jun 15 🍅 Harvest: Aug 17 – Oct 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.

Plant Water Budget

Plant needs
1.0″/week
Rainfall provides
0.5″/week
You supply
0.7″/week
Watering frequency 1-2 times/week
Season total 889 gal / 100 sq ft
Drought risk

Water stress score is 6/10 โ€” consider drought-tolerant varieties and mulching

Tomatillo needs ~1,106 GDD — county provides 2,333 GDD Excellent fit

Tomatillo Planting Timeline โ€” Gooding County, ID

Tomatillo Planting Calendar

Activity When Date Range
Start Indoors March 8 Mar 8 โ€“ Mar 22
Transplant Outdoors May 17 May 17 โ€“ May 31
Direct Sow May 10 May 10 โ€“ May 31
Harvest July 19 Jul 19 โ€“ Sep 27

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 โ€”
July Harvest
August Harvest
September Harvest
October โ€”
November โ€”
December โ€”

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

Moderate โ€” regular watering

Days to Maturity

60โ€“85 days

Soil pH

6 โ€“ 7

USDA Zone

Zone 5b

Growing Season

153 days

Growing Tips for Gooding County

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

Level Up Your Garden

Frequently Asked Questions

When should I plant Tomatillo in Gooding County, ID?

Gooding County is in Zone 5b with an average last frost of May 3. Plan your Tomatillo planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Gooding County, ID?

Gooding County, Idaho is in USDA Hardiness Zone 5b. The average last spring frost is May 3 and first fall frost is October 3.

๐ŸŒฑ

Plan Your Garden with Confidence

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

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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 Gooding County, ID. Local conditions may vary. Last updated: April 2026.