Welcome to the Gilpin County Noxious Weed website

Protect our wildflowers from Noxious weeds.

Control the weeds on your property.

Noxious Weeds In Gilpin County (click on green link for more)

Canada Thistle

Chinese Clematis

Diffuse Knapweed -

Downy Brome/cheatgrass

Weed cost share program for Gilpin County residents to control weeds on their property. If you have thistles, knapweeds, oxeye daisy, and scentless chamomile, you can check out a new herbicide called Milestone, which has a very low use rate, is labelled as practically non-toxic (for people, bees, birds, and aquatics and groundwater), and is not restricted use. The Extension Office will have a bottle of Milestone and a sprayer available for checkout at no charge. There will be a $100 dollar, fully refundable deposit to ensure prompt return of the sprayer. If you don’t want to do the work yourself, or have weeds for which Milestone is not effective, we will be able to cover half the cost for a contractor to come out (on a limited, first-come, first-serve basis).

Gilpin County Weed Ordinance

Colorado State Weed law and State Noxious weed list

Why Controlling Noxious Weeds Is Important

Principles of controlling weeds on your property

Why revegetating a new leach field is important

But some weeds are pretty! Are they really that bad?

Why weeds are like wildfire

How can I get help in identifying and controlling my weeds?

I would like to know more about herbicides

Home use pesticide database

Colorado Environmental Pesticide Education program

Not all thistles are noxious!

Did you know horses can spread weeds when fed hay that contains weed seed?

Information on weed-free hay

For those with new construction: newly excavated or bare areas should be revegetated to prevent weeds and erosion. Visit the Mountain Master Gardener Website for local information on how to replant your land.

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