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When to Plant Parsnip in Mesa County, CO

Parsnips are a sweet, nutty root vegetable that develops best flavor after exposure to frost. They require a long growing season but reward patient gardeners.

Mesa County, Colorado is in USDA Zone 6b. The average last spring frost is May 1 and the first fall frost is October 9, giving you a growing season of approximately 161 days.

At an elevation of 6,091 feet, Mesa County receives approximately 23.3 inches of rainfall annually with predominantly loam soil. Summer highs average 91ยฐF, providing good warmth for Parsnip during the growing season.

Mesa County, CO (Zone 6b) Moderate season
161 days
Last Spring Frost May 1
161 growing days
First Fall Frost October 9

Mesa County Soil Profile

Soil Type

Loam

Soil pH

6.7-8.1

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (18 days to spare)
Transplant: Apr 22 🍅 Harvest: Aug 5 – Sep 16
Recommended (50%) ✓ Fits season (14 days to spare)
Transplant: May 1 🍅 Harvest: Aug 14 – Sep 25
Safe Start (90%) ✓ Fits season (17 days to spare)
Transplant: May 14 🍅 Harvest: Aug 27 – Oct 8

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
0.6″/week
You supply
0.5″/week
Watering frequency 1-2 times/week
Season total 674 gal / 100 sq ft
Drought risk

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

Parsnip needs ~2,099 GDD — county provides 2,938 GDD Excellent fit

Parsnip Planting Timeline โ€” Mesa County, CO

Parsnip Planting Calendar

Activity When Date Range
Direct Sow April 17 Apr 17 โ€“ May 8
Fall Sowing July 31 Jul 31 โ€“ Aug 14
Harvest July 31 Jul 31 โ€“ Sep 11

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

Month-by-Month Timeline

MonthActivities
January โ€”
February โ€”
March โ€”
April Direct Sow
May Direct Sow
June โ€”
July Fall Sowing Harvest
August Fall Sowing 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

100โ€“130 days

Soil pH

6 โ€“ 7

USDA Zone

Zone 6b

Growing Season

161 days

Growing Tips for Mesa County

Use only fresh seed as parsnip seed viability declines rapidly. Sow directly in spring in deeply worked soil. Leave roots in the ground through winter for sweetest flavor.

Companion Planting

Good Companions

Avoid Planting Near

  • Carrots
  • Celery

Level Up Your Garden

Frequently Asked Questions

When should I plant Parsnip in Mesa County, CO?

Mesa County is in Zone 6b with an average last frost of May 1. Plan your Parsnip planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Mesa County, CO?

Mesa County, Colorado is in USDA Hardiness Zone 6b. The average last spring frost is May 1 and first fall frost is October 9.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Mesa 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 Mesa County, CO. Local conditions may vary. Last updated: April 2026.