PetraMax Blue Herbicide Lawn Dye - Super Strength Concentrate 3X More Than Others, for Herbicides, Fertilizer & Weed Killer - Blue Mark Spray Indicator for Home and Commercial Sprayer Use (32 oz)

I reviewed a lot of dyes and decided on this one. Wow, I had no idea it worked that well. When they said it will stain (not the weeds), anything else; it could not be a more true statement. I didn’t listen and yes, it stained my pants, but that was my fault. As far as the weeds, I mixed the suggested product to weed killer and it worked way beyond what I imagined. The second batch I made used less product and worked just as well. If you are trying to decide on a color product, look no further. This stuff really works and will last a long, long time. I will definitely purchase again when I need to. Thanks.

Very little per gallon really shows a pattern. Fades from plants and equipment in a day or two. Second time purchasing this quality brand and not the last.

It's a bit more expensive then competitors. Allegedly it's more concerntrsted. I used their minimum directed amount and it was hard to see so I have to use more which makes it seem no better than competitive product. One stray drop makes a mess. Which someone would develop a better dispensing bottle that was mess free. I would pay more for that. Currently using 1 teaspoon eye droppers. But still gets messy.

This is the neatest item. Can tell where you've previously sprayed. Lives up to its description. Highly recommend. Be sure to wear gloves or you'll look like a smurf!

Be very careful when mixing or everything you own will turn blue! Great product, just be very careful with it. I recommend wearing gloves and mixing somewhere outside like on the driveway or in the grass. Super strong!