And that is: Stop using hose-end sprayers. First of all, I don’t like trusting cheap plastic devices to mix the formula for me as the “hose ends” have to do. That’s how they function.

We tested some of the best-reviewed hose end sprayers for outdoor chores. From multiple spray patterns to powerful pressure, there's a sprayer in this lineup for everything.

fill the reservoir on your hose end sprayer with the urea solution, and fit the container to the bottle attachment on the nozzle if applicable. This allows your urea solution to mix with water as it's ...