Weeds of ConcernNative WeedsPoisonous Weeds

Upper South Platte Weeds of Concern

Orange Hawkweed

Orange Hawkweed-
A New invader that is a threat to Native vegetation.

Ox-eye Daisy Oxeye Daisy-
Dangerous to Livestock, this invasive threatens to displace Native Daisies.
Scentless Chamomile Scentless Chamomile-
Also poses a threat to Livestock, this escaped ornamental spreads by seed that can live for years.
Dalmation Toadflax Dalmation Toadflax-
Once this toadflax spreads beyond a certain point, it can become extremely difficult to eradicate.
Yellow Toadflax Yellow Toadflax-
An extensive root system makes control difficult-removal of plant before it seeds is essential. PULL and BAG the whole plant. Keep at it in succeeding years for complete eradication.
Black Henbane Black Henbane-
All parts of this plant are poisonous to humans and livestock- it's foul odor is reason enough to be rid of it.
Diffuse Knapweed Diffuse Knapweed-
Produces large amounts of seed, control is focused on seed production
Spotted Knapweed Spotted Knapweed-
Again, stopping seed production is the key- it produces a chemical that acts as a herbicide on all surrounding vegetation.
Myrtle Spurge Myrtle Spurge-
Another "escaped" ornamental. Reproducing from it's taproot, the sap is toxic- avoid skin contact with sap!
Leafy Spurge Leafy Spurge-
New to the mountains- be on the lookout! Also has irritating sap, use care.
Musk Thistle Musk Thistle-
Prickly, it spreads by seed- BAG the seed heads before they can spread. Sever the tap root.
Canada Thistle Canada Thistle-
Reproduces both by seed and taproot- DON'T DISTURB THE ROOT- Bag heads and cut plant 8" to 10" from the ground.