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When to Plant Horehound in Gooding County, ID

Horehound is a woolly, drought-tolerant perennial herb traditionally used for cough remedies and candy. It has a distinctive bitter, menthol-like flavor.

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 Horehound during the growing season. With low rainfall, drip irrigation is essential for growing Horehound 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 (11 days to spare)
Transplant: May 6 🍅 Harvest: Jul 22 – Sep 16
Recommended (50%) ✓ Fits season (13 days to spare)
Transplant: May 10 🍅 Harvest: Jul 26 – Sep 20
Safe Start (90%) ✓ Fits season (2 days to spare)
Transplant: Jun 8 🍅 Harvest: Aug 24 – Oct 19

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
0.5″/week
Rainfall provides
0.5″/week
You supply
0.1″/week
Watering frequency Only during dry spells
Season total 72 gal / 100 sq ft
Drought risk

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

Horehound needs ~1,258 GDD — county provides 2,333 GDD Excellent fit

Horehound Planting Timeline โ€” Gooding County, ID

Horehound Planting Calendar

Activity When Date Range
Transplant Outdoors May 10 May 10 โ€“ May 24
Harvest July 26 Jul 26 โ€“ Sep 20

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

Month-by-Month Timeline

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

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

Low โ€” drought tolerant

Days to Maturity

75โ€“90 days

Soil pH

6 โ€“ 8

USDA Zone

Zone 5b

Growing Season

153 days

Growing Tips for Gooding County

Direct sow or start from divisions. Thrives in poor, dry soil. Harvest stems just before flowering. Deadhead to prevent aggressive self-seeding. Very drought-tolerant once established.

Companion Planting

Good Companions

Level Up Your Garden

Frequently Asked Questions

When should I plant Horehound in Gooding County, ID?

Gooding County is in Zone 5b with an average last frost of May 3. Plan your Horehound 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.

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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.