Roger writes
Yes, I keep readin "per thousand feet" when people are asking about PER GALLON. Why in hell can't you give an answer? Seems simple - answer the damned question as asked!
There is a very clear and real reason as to why these chemicals are given at rates per 1000 sq/ft and not per gallon. Per gallon rates ONLY apply to spot treatments, and even then it still takes into consideration the broadcast rate instructions. If you are spraying an entire surface of a lawn for weeds, it is imperative that you get the correct amount of chemical/active ingredient dispersed evenly over the correct amount of surface area. Herbicides work on weeds by being distributed at a certain rate per area to yield the results you are looking for. If a product states to use for example 1 oz per 1000 sq/ft, the water volume you use can vary from person to person, yard to yard, and equipment used to apply it. If you apply 1 oz of chemical over 500 sq/ft for instance, you would kill your weeds but you also would harm your lawn because the concentration of chemical to area is too dense. If you use 1 oz of chemical over 1,500 sq/ft, you have spread the active ingredient too thin to work effectively and wont kill the weeds or the grass. The water volume is based on your individual situation which is why it is recommended to calibrate your sprayer to know how much water volume you personally use to get sufficient coverage in your yard. If I mow my lawn at a 2 inch height and have barely any weeds to spray, I will use less water to disperse 1 oz of chemical over 1000 sq/ft than you would if you mow your grass at a 4 inch height, and have large established weeds that will take more water volume to cover them, but still the same amount of chemical. If you know it takes you 2 gallons of water to cover 1000 sq/ft, then THAT is what you mix the rate of chemical to per label instructions for your grass type. You can see a video on how to measure and calibrate your sprayer before adding chemicals to it HERE.
According to the Mec Amine D 3-Way Broadleaf Herbicide Product Label:
For cool season grasses such as Fescue, Rye, and Bluegrass: Use 1.1 to 1.5 oz per 1000 sq/ft in your calibrated volume of water for your yards needs
For warm season grasses such as Bermuda, Zoysia, Centipede, etc: Use 0.5 to 0.9 oz per 1000 sq/ft in your calibrated volume of water for your yards needs.
Answer last updated on: 05/12/2021
