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Q: I need to kill many types of weeds growing in my horse pasture. I want to find something that is effective and safe for the horses. We are at an of altitude of 8500'.
Hardiness Zone: 5b
Molly from Boulder, Colorado
A: Molly,
I wouldn't even want to speculate on what type of weed killers (homemade or commercial) would be safe to use around your horses. The labels on some commercial herbicides recommend restricting grazing for two weeks after application, some 7 days and some have no restrictions at all. Even in the case of the so-called homemade "safe" remedies, some ingredients can be toxic to some animals. Fortunately for you, one of the world's premier equine veterinary hospitals (CSU) is located in your state. I would recommend calling them for more information.
http://www.csuvets.colostate.edu/equinehospital/
You might also visit the Colorado State University extension agency's Ag Weed pages at http://www.coopext.colostate.edu/boulder/AG/agweeds.shtml and http://www.ext.colostate.edu/PUBS/natres/03106.html.
This publication by the Table Mountain Association might also be of interest to you http://bcn.boulder.co.us/community/tma/news/11/tmaweed2.html.
Good Luck!
Ellen
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