Monterey 8oz Mark It Blue

effective but a little pricey

The blue dye does make seeing spots already sprayed visible. It fades over the course of three or four days.

The cost is about $1.15 per gallon of herbicide in diluted form. A bottle provides enough for about 8 gallons.

To avoid getting dye on fingers, etc. vinyl gloves should be used. Probably very difficult to get out of clothing.Read full review

Verified purchase:  Yes • Condition: new • Sold by: max_warehouse

Did not color grass.

Mixed as given ratio but it didn’t color the grass I was spraying. Mixed the second batch with twice the amount and still no coloring on grass. Disappointed as I was using it with an expensive insecticide and wanted to see where I had sprayed. Maybe I will have to double up the amount again next time I use it if there is enough left. Read full review

Verified purchase:  Yes • Condition: new • Sold by: estategeneral

Mark weeds blue

Product works good, I put 3 tsp in a gallon of water and herbicide to mark the the crab grass I was treating.

Verified purchase:  Yes • Condition: new • Sold by: pens_n_more

Good marking fluid

Makes it easy to see where you have already sprayed.

Verified purchase:  Yes • Condition: new • Sold by: max_warehouse

Now I can see

Allows you to see where you’ve sprayed when mixed with your herbicide. Spraying overlap with herbicides can kill your lawn. This shows exactly where you’ve applied your chemical.

Verified purchase:  Yes • Condition: new • Sold by: esbenshadesgard...

Blue marker for spray

The blue on the green leaves just don’t show up very well. Won’t purchase any more

Does as it says

Great product good but

Verified purchase:  Yes • Condition: new • Sold by: max_warehouse

No more missed spots

Works as expected colts sprayed areas blue so you don't miss or overspray

Verified purchase:  Yes • Condition: new • Sold by: promax_supply

Great stuff

Good color even on green grass

Verified purchase:  Yes • Condition: new • Sold by: aerior0

Good Quality dye...

Good Quality dye

Verified purchase:  Yes • Condition: new • Sold by: 716buffalovers