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When to Plant Parsnip in Montana

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.

Montana spans USDA hardiness zones 3b, 4a, 4b, 5a (with planting data available), so planting dates vary by your location within the state. Click your zone below for the most accurate dates.

Find Your County

Click your county for exact Parsnip planting dates based on your local frost dates.

Parsnip Planting Calendar for Montana

Zone 3b ~135 day growing season · Full guide →

Last frost: May 10 · First frost: September 22 · 135 day season

Activity When Date Range
Direct Sow May 3 May 3 – May 24
Harvest August 16 Aug 16 – Sep 6
Fall Sowing June 30 Jun 30 – Jul 14
Zone 4a ~145 day growing season · Full guide →

Last frost: May 6 · First frost: September 28 · 145 day season

Activity When Date Range
Direct Sow April 29 Apr 29 – May 20
Harvest August 12 Aug 12 – Sep 23
Fall Sowing July 6 Jul 6 – Jul 20
Zone 4b ~155 day growing season · Full guide →

Last frost: May 1 · First frost: October 3 · 155 day season

Activity When Date Range
Direct Sow April 24 Apr 24 – May 15
Harvest August 7 Aug 7 – Sep 18
Fall Sowing July 11 Jul 11 – Jul 25
Zone 5a ~166 day growing season · Full guide →

Last frost: April 25 · First frost: October 8 · 166 day season

Activity When Date Range
Direct Sow April 11 Apr 11 – May 2
Harvest July 25 Jul 25 – Sep 5
Fall Sowing July 30 Jul 30 – Aug 13

Growing Tips for Montana

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.

Frequently Asked Questions

When should I plant Parsnip in Montana?

Planting dates for Parsnip in Montana depend on your USDA zone. Montana spans zones 3b, 4a, 4b, 5a. Check the planting calendar above for your specific zone's frost dates and planting windows.

What zone is Montana for planting?

Montana contains USDA hardiness zones 3b, 4a, 4b, 5a. Your specific zone depends on your location within the state — northern and higher-elevation areas are in colder zones, while southern and coastal areas are warmer.

Data sources: USDA Plant Hardiness Zone Map (2023), NOAA 30-Year Climate Normals, University Cooperative Extension planting guides. Last updated: April 2026.