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Orange Hawkweed

Species
Hieracium aurantiacum

Orange hawkweed is a hardy herbaceous perennial with striking orange dandelion-like flowers. It originated in Europe and was exported widely as an ornamental, but has escaped cultivation and is now considered a noxious weed in many parts of the world. Plants have attractive, bristly-hairy leaves and flower stems.

How does it spread?
Orange hawkweed spreads in four ways: above ground runners (stolons), root buds, horizontal roots and seed, but established populations increase in size mostly through stolons. Each individual can produce hundreds of viable seeds, and these are distributed by wind to new locations.  Pack animals, wildlife, recreational and agriculture activities, as well as wind and contaminated materials contribute to further spread and introduction.

Where would I find it?
Orange hawkweed grow at low to mid elevations throughout BC, preferring well-drained, acidic, coarse-textured soils. It can be found invading disturbed sites roadsides and clearings and open, natural areas, including pastures and fields. Orange hawkweed is considered a major concern across interior BC from the Peace River region to the Kootenays and Cariboo.

What problems does it cause?
Orange hawkweed and can form dense mats of rosettes, blanketing roadsides, fields or meadows, outcompeting native vegetation.  It also impacts the forest industry by invading areas that have been deforested, as well as the agriculture industry and wildlife by outcompeting forage plants in pastures and hay fields. 

Additional Recommendations

  • Himilary Cinquefoil Hybrids (Potentilla atrosanguinea hybrids) (z5)
  • Scarlet Avens (Geum quellyon) (z5)

A provincial initiative coordinated by ISCBC

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