Karon from Ms writes
Each manufacturer has to pay to get their product registered in each state. CoRoN 18-3-6 Plus 0.5% is manufacturered by a smaller company and not all manufacturers register their products in certain states because of the expense and time put into the registration process in those states. Also, each state renews their registrations for pesticides and insecticides that are able to be shipped to their state each year and some manufacturers don't get renewed if certain guidelines aren't met with new changes in state legislations.
Answer last updated on: 05/15/2021