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

New invader! Sulfur cinquefoil

Weed Cost Share Program

If you live in Gilpin County, you can call the Extension office for help in identifying and controlling your weeds. Further, the Gilpin Commissioners have generously provided some cost share money to help people. You can either do the work yourself for free (herbicide checkout program), or get half of the cost of a contractor to do the work for you (up to $200 per property).

Herbicide check out: Milestone is labelled as practically non-toxic (for people, bees, birds, and aquatics and groundwater, and is not restricted use. It provides excellent control for thistles, knapweeds, oxeye daisy, and scentless chamomile. Plateau is similar, but is used for cheatgrass and leafy spurge. The Extension Office will have herbidice and a sprayer available for checkout at no charge (up to a reasonable acreage). There will be a $100 dollar, fully refundable deposit to ensure prompt return.

Gilpin County Weed Ordinance

Colorado State Weed law and State Noxious weed list

Visit this site to learn more about the new rules on the control of Chinese Clematis, Oxeye daisy, diffuse knapweed, and yellow toadflax which affect landowners in Gilpin County.

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?

Here is a list of weed-free hay vendors.

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.

Can you recognize noxious weeds? Test your knowledge!

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I want it said of me by those who knew me best, that I always plucked a thistle and planted a flower where I thought a flower would grow.

-Abraham Lincoln

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