Brad from Connecticut writes
We would recommend turning the water flow of your hose off and shake the container to listen or feel for some of the concentrate inside the bottle. The Ortho Weed B Gon Weed Killer For Lawns Ready to Spray concentrate is also an amber-ish colored liquid, so you should be able to see a slight color change when it runs out. You can also use the coverage area the manufacturer states that product should cover to help you determine when you should be close to running low.
Answer last updated on: 06/17/2021