Single-Herb Tinctures › Blue Vervain Image 1 of 1 Blue Vervain from $12.99 Blue Vervain (Verbena hastata) is a great nervine for tight tense muscles. Size: Select Size 1 ounce 2 ounces Quantity: Add To Cart Added! Blue Vervain (Verbena hastata) is a great nervine for tight tense muscles. Reviews Reviewer Name Review Date Star Rating Description Posted on Etsy Product Show More