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Garden heliotrope or Valerian

(Valeriana officinalis)

Photo of valerian
Photo credit: Wisconsin DNR

Tall (1-5') herbaceous perennial with fleshy stalks. They were introduced as a medicinal plants. Roots have a pungent odor. Plants emerge early in spring.

Overview map of valerian classification in WI
Restricted (orange) counties

Other names for this plant include:

  • Common names: garden heliotrope, garden valerian, Greek valerian, common valerian

Classification in Wisconsin: Restricted

Ecological Threat
  • Invades upland forests, wetlands, marshes, woodland swamps, grasslands, and stream edges.
  • Tolerant of both wet and dry conditions.
  • It is rapidly expanding its range in northern Wisconsin.
  • Early emergence, vigorous growth habits and the ability to self-seed give this species a competitive advantage resulting in the displacement of native species.
Identification

Leaves & stems: Opposite, pinnately compound leaves. 5-25 toothed lanceolate leaflets.

Flowers: White to pale-pink tiny flowers arranged in tight clusters.

Fruits & seeds: Small oblong capsules release abundant powdery seeds.

Roots: White, fleshy rhizomes with thick fibrous roots and a pungent odor.

Control
Mechanical:
  • Pull, cut or mow plants before flowering.
Chemical:
  • Foliar spray with triclopyr or glyphosate.
Resources
Sources for content:
  • Czarapata, Elizabeth; Invasive Plants of the Upper Midwest: an illustrated guide to their identification and control. The University of Wisconsin Press. 2005. Pg. 70-72
  • Robert W. Freckmann Herbarium. The University of Wisconsin-Stevens Point. Valeriana officinalis. [exit DNR]
  • Invasive Plant Atlas of New England
  • Gleason, H., Cronquist, A. 1991. Manual of Vascular Plants of the Northeastern United States and Adjacent Canada Second Edition; pg 66.
Links for more information: