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When to Plant Parsley in Nez Perce County, ID

Parsley is a biennial herb available in flat-leaf (Italian) and curly varieties. It is a nutritional powerhouse rich in vitamins C and K and adds fresh flavor to countless dishes.

Nez Perce County, Idaho is in USDA Zone 6b. The average last spring frost is May 12 and the first fall frost is September 26, giving you a growing season of approximately 137 days.

At an elevation of 4,819 feet, Nez Perce County receives approximately 16.7 inches of rainfall annually with predominantly loam soil. Summer highs average 90ยฐF, providing good warmth for Parsley during the growing season. With low rainfall, drip irrigation is essential for growing Parsley successfully. Mulch heavily to conserve soil moisture.

Nez Perce County, ID (Zone 6b) Short season
137 days
Last Spring Frost May 12
137 growing days
First Fall Frost September 26

Nez Perce County Soil Profile

Soil Type

Loam

Soil pH

6.6-8

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (17 days to spare)
Start indoors: Apr 2 Transplant: Apr 30 🍅 Harvest: Jul 2 – Sep 3
Recommended (50%) ✓ Fits season (18 days to spare)
Start indoors: Apr 7 Transplant: May 5 🍅 Harvest: Jul 7 – Sep 8
Safe Start (90%) ✓ Fits season (8 days to spare)
Start indoors: May 2 Transplant: May 30 🍅 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.

Plant Water Budget

Plant needs
1.0″/week
Rainfall provides
0.5″/week
You supply
0.6″/week
Watering frequency 1-2 times/week
Season total 714 gal / 100 sq ft
Drought risk

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

Parsley needs ~1,225 GDD — county provides 2,397 GDD Excellent fit

Parsley Planting Timeline โ€” Nez Perce County, ID

Parsley Planting Calendar

Activity When Date Range
Start Indoors April 7 Apr 7 โ€“ Apr 21
Transplant Outdoors May 5 May 5 โ€“ May 19
Direct Sow April 28 Apr 28 โ€“ May 19
Fall Sowing July 18 Jul 18 โ€“ Aug 1
Harvest July 7 Jul 7 โ€“ Sep 8

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

Month-by-Month Timeline

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

Growing Conditions

Sun

Partial Shade (3-6 hours)

Water

Moderate โ€” regular watering

Days to Maturity

60โ€“80 days

Soil pH

6 โ€“ 7

USDA Zone

Zone 6b

Growing Season

137 days

Growing Tips for Nez Perce County

Start seeds indoors 6-8 weeks before last frost. Soak seeds overnight as germination is slow. Harvest outer stems first to keep plants productive. Parsley attracts swallowtail butterflies.

Companion Planting

Good Companions

Avoid Planting Near

  • Mint
  • Lettuce

Level Up Your Garden

Frequently Asked Questions

When should I plant Parsley in Nez Perce County, ID?

Nez Perce County is in Zone 6b with an average last frost of May 12. Plan your Parsley planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Nez Perce County, ID?

Nez Perce County, Idaho is in USDA Hardiness Zone 6b. The average last spring frost is May 12 and first fall frost is September 26.

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Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Nez Perce County gardeners in Zone 6b 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 Nez Perce County, ID. Local conditions may vary. Last updated: April 2026.