Herbicides
These herbicide recommendations are provided by the Grand County Division of Natural Resources. Contact Grand County DNR with questions...970-887-0745
READ AND FOLLOW ALL INSTRUCTIONS ON THE HERBICIDE LABEL PRIOR TO USE. THE LABEL IS THE LAW!
Don’t forget to add a nonionic surfactant at a rate of 0.32 oz/gallon to reduce water surface tension and allow for better mixing of water and chemical. You may use commercial surfactants or generic dish soap.
Organic Herbicide
Organic herbicides have gained popularity over the last few years. They are often made from a mix of vinegar, salt, and dish soap. There are mixed reviews on the effectiveness of organic herbicides. Some say they work great; others say they show initial results but the plants bounce right back within a week or two.
Anyone considering the use of organic herbicides should note that they are NON-SPECIFIC, meaning that they have the potential to kill anything they are sprayed on (including grass, desired native plants, and potentially soil organisms).
TAKE CARE TO SPOT SPRAY ONLY WHAT YOU WANT TO DIE!!!
All in all, do your research and make sure you know the facts prior to choosing your herbicide preference.
Timing is Everything
Herbicides often target a specific growth stage of a plant and are only effective if applied at the proper time. Check to see when the herbicide you plan to use is most effective and be sure to apply at that time. If you have passed that time, see if there is an alternative herbicide that you can use instead.
Other Herbicide Resources
List of Noxious Weeds and Herbicides that work on them
| NOXIOUS WEED | MILESTONE | CHLORSULFURON | 2,4-D | CURTAIL | GLYPHOSATE |
|---|---|---|---|---|---|
| Black henbane | X | X | |||
| Chamomile | X | X | X | ||
| Cheatgrass/Downy brome | X | ||||
| Common Mullein | X | X | |||
| Common Tansy | X | ||||
| Cypress Spurge | X | ||||
| Dame’s Rocket | X | ||||
| Field bindweed | X | ||||
| Hoary cress/Whitetop | X | X | |||
| Houndstongue | X | X | |||
| Leafy Spurge | X | X | X | ||
| Knapweeds | X | X | |||
| Orange hawkweed | X | X | X | ||
| Oxeye daisy | X | ||||
| Perennial Pepperweed | X | X | |||
| Sulphur Cinquefoil | X | ||||
| Tamarisk/Salt cedar | CALL 887-0745 | X | |||
| Thistles | X | X | X | X | |
| Whitetop/Hoary cress | X | X | |||
| Wild caraway | X | ||||
| Toadflax(s) | X |
Herbicide Giveaways
Grand County: Grand County Natural Resources provides herbicide to landowners on FRIDAYS in Granby (County Shop @ 469 E. Topaz) starting on the last Friday in May and continuing every Friday (from 8 am – Noon) through the last Friday in September. You MUST bring your own SPRAYER. No jugs, no cans, no gas cans, no buckets, etc. They will limit folks to no more than 4 Gallons a week. Herbicide is provided free of charge to interested landowners.
For information on what to do with old or leftover herbicides or other household hazardous wastes, please click HERE.
Contact Grand County Natural Resources at 970.887.0745 for more information.
Summit County: Summit County has a Weed Control Cost-Share Program. The Summit County Weed Control Cost Share Program helps property owners offset the costs associated with noxious weed management. Qualified applicants are eligible for up to $500 per year in Cost Share funds. The Cost Share Program operates on a “first come first serve” basis, with high priority weed species taking precedence over more common species. Call Ryan Cook at 970.688.4218 for more information.
Ag Producers: Middle Park Habitat Partnership Program gives up to $500 worth of herbicide to production agriculture folks in both Grand and Summit Counties. Contact Amy Sidener at 970.887.0745. The program is limited and starts around April 15th of every year. You must own/operate at least 640 acres to be eligible. Funds are limited and do run out each year.