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When to Plant Valerian in Oklahoma

Valerian is a tall perennial herb with fragrant white or pink flower clusters, valued for its root which is used as a natural sleep aid. It attracts pollinators and earthworms.

Oklahoma spans USDA hardiness zones 6b, 7a, 7b (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 Valerian planting dates based on your local frost dates.

Valerian Planting Calendar for Oklahoma

Zone 6b ~205 day growing season · Full guide →

Last frost: April 3 · First frost: October 25 · 205 day season

Activity When Date Range
Transplant Outdoors April 10 Apr 10 – Apr 24
Harvest August 14 Aug 14 – Oct 23
Zone 7a ~221 day growing season · Full guide →

Last frost: March 25 · First frost: November 1 · 221 day season

Activity When Date Range
Transplant Outdoors April 1 Apr 1 – Apr 15
Harvest August 5 Aug 5 – Nov 11
Zone 7b ~235 day growing season · Full guide →

Last frost: March 18 · First frost: November 8 · 235 day season

Activity When Date Range
Transplant Outdoors March 25 Mar 25 – Apr 8
Harvest July 29 Jul 29 – Nov 4

Growing Tips for Oklahoma

Start seeds indoors and transplant after last frost. Harvest roots in fall of the second year. Deadhead flowers unless you want self-seeding. Cats are attracted to valerian root.

Frequently Asked Questions

When should I plant Valerian in Oklahoma?

Planting dates for Valerian in Oklahoma depend on your USDA zone. Oklahoma spans zones 6b, 7a, 7b. Check the planting calendar above for your specific zone's frost dates and planting windows.

What zone is Oklahoma for planting?

Oklahoma contains USDA hardiness zones 6b, 7a, 7b. 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.