Bernard from Saskatoon writes
Unfortunately, there has not been any testing done by the manufacturer of Tenacity on the compatibility of tank mixing Tenacity Herbicide and Certainty Herbicide. We would suggest doing a small compatibility test in glass jar to see if the products separate or clump in any way. The Certainty Herbicide product label advises to add water to the tank ½ way then add the Certainty first and then the Tenacity, shake vigorously and fill the remaining way with water and shake again.
Answer last updated on: 10/07/2022