Hieracium Pilosella - Cultivation and Uses

Cultivation and Uses

Mouse-ear Hawkweed has become a common introduced invasive species in North America (where it is found in southern Canada and both northeast and northwest U.S.), and New Zealand. It is a level C noxious weed in the United States (with higher levels in the states of Washington and Oregon), and a weed in Quebec. It does not have special designations in other locations of Canada. It is known to be strongly invasive in New Zealand's tussock fields, where there are no native species of hawkweed, and biological control measures are being undertaken to control it and other hawkweed species.

Joseph Pitton de Tournefort mentions that blades covered in this plant's juices were believed to cut through stone as easily as through wood.