Growing Valerian in Zone 3B

Valerian is a tall, fragrant perennial grown for its roots, which are used in calming supplements. The flowers attract beneficial insects in droves.

Zone 3B has a short growing season — start seeds indoors when possible and use season-extending techniques like cold frames and row covers.

Top Growing Tips

• Grows to 4-5 feet tall — plant toward back of borders
• Flowers attract cats similarly to catnip — protect if needed
• Roots are harvested in fall of the second year for maximum potency
• Attracts earthworms to the surrounding soil — excellent for soil health
• Self-seeds freely; deadhead to control spread

Companion Planting

Good companions: most vegetables (beneficial insect attractor), lettuce, peas

Avoid planting near: Too-close planting where it will shade shorter crops

Harvest Timeline

Harvest roots in fall of year 2+; harvest flowers anytime for dried arrangements

About Zone 3B

USDA Hardiness Zone 3B has an average last spring frost around May 15 and first fall frost around Sep 15. All planting dates above are calculated from these frost dates. Your specific location may vary — check with your local extension office for the most accurate dates.