Is toadflax invasive in Colorado?

Yellow toadflax (Linaria vulgaris) and the Dalmatian toadflaxes (Linaria dalmatica and Linaria genistifolia) are invasive, perennial weeds that are noxious in Colorado and other western states.

Where does yellow toadflax live?

Yellow toadflax is a short-lived perennial herb native to the steppes of southeastern Europe and southwestern Asia (Eurasia). This species spreads by both seeds and vegetative buds on its roots and creeping rhizomes (see Figure 1).

What kills yellow toadflax?

Chlorsulfuron at 1.5 to 2.25 ounces active ingredient per acre, sprayed to wet, at bud to full bloom suppresses yellow toadflax. Use a nonionic surfactant at 0.25 percent by volume. This chemical kills broadleaved plants and is selective to many grasses.

Is toadflax poisonous?

Toadflax, also called yellow toadflax, contain alkaloids and glycosides that can be toxic in horses; horses will typically avoid eating the plant; however, hay with a high amount of toadflax can lead to gastrointestinal upset.

Is toadflax poisonous to humans?

Toadflax-based folk medicine preparations are unlikely to be acutely toxic at the dosages traditionally administered to humans.

Is toadflax toxic to dogs?

All parts of the plant can be life-threatening to humans and animals if eaten, but dogs and cats are usually most at risk. Symptoms include nausea, vomiting, abdominal pain and dilated pupils.

Will toadflax grow in shade?

Purple toadflax is of no interest to deer. It grows well and blooms reliably in dry, rooty soil and shade. It thrives in sunny spots. Bumblebees love it.

What is toadflax used for?

People take yellow toadflax for digestive and urinary tract disorders. It is also used to reduce swelling, relieve water retention by increasing urine production (as a diuretic), and cause sweating. Some people apply yellow toadflax directly to the skin for hemorrhoids, wounds, skin rashes, and foot ulcers.

Is toadflax annual or perennial?

herbaceous perennial
Common toadflax is a native herbaceous perennial with an extensive spreading root system. It is found throughout Britain. Common toadflax occurs in hedgebanks, waysides, woodland clearings and waste grassy places on dry, well-drained gravelly, sandy or chalky soils.

Is yellow toadflax poisonous to humans?

The toxicity of yellow and Dalmatian toadflax to humans and animals is poorly understood, but it is most likely low. Exposure is less uncertain.

Is toadflax a perennial?

Common toadflax is a native herbaceous perennial with an extensive spreading root system. It is found throughout Britain. Common toadflax occurs in hedgebanks, waysides, woodland clearings and waste grassy places on dry, well-drained gravelly, sandy or chalky soils.

Does toadflax need full sun?

Toadflax Care Toadflax prefers full sun and grows well in poor, rocky soils. The U.S. Department of Agriculture plant hardiness zone depends upon the species, but most are hardy in zones 5 through 8 or 9.