BASF Turf Mark Blue Spray Marking & Pattern Indicator Dye for Weed, Fertilizer & Herbicide Application on Grass and Lawns, Non-permanent 32 oz

The directions call for 2-3 ounces of product for 3 gallons of water. I mixed the product at 2 ounces and it works great. My grass/weeds are pretty yellow as you can see in the picture, so it does stand out pretty good. If your grass is a lot greener you might have to go with a bit more in the water. I works great on the grass, but wear rubber gloves when mixing it unless you enjoy being mistaken for part Smurf. You can see my hand in the picture and that is after scrubbing with soap and water. It also will stain concrete. It will also stain dog feet! No, there was no chemical in the water when I did any of this, it was just the Blue Turf Mark. I just got the sprayer hooked up to my new lawn tractor and was experimenting with the color, flow rate, etc. I found that it also stains the bare feet of my 4 year old grandson! All in all I'm quite pleased with it. Now that I know how it sticks to non-grass surfaces, I'll be more careful in the future. I will definitely purchase more when I need it.

Easy to use, easy to mix, easy to measure and does not cause permanent stain. Was off my bermuda grass within 24hrs. It comes with a label with all the directions and first aid information. Measurement is on ml or oz for a proper dosign regardless if you use metric (like me) or imperial. Recommended!

Works great but next time I will add a little more to see where I've sprayed.

BEWARE!!! This marker is fabulous! I have saved a LOT of money because I'm not overspraying the same areas. This particular one washes away from my gravel, and whatever I you spray it on. The self measuring bottle is perfect (because you don't want to get this stuff on any more items than necessary.) The negative side of the measuring spout is that after measuring the first ounce, you have to look at the fluid from above because you can't see through the plastic. On the plus side: since I have always had problems seeing the fill line through my tank, the die darkens the liquid adequately, making the fill line visible. Another negative with this die: NO MATTER THE GLOVES--somehow, some way, this vibrant blue goo finds its way to your skin. I guess that is a blessing in disguise--you can see if/where you may have gotten some herbicide on you.

I thought this might be a 'luxury' I didn't need. I've been spraying for years without it. Well, for gross spraying - down the edges of the rural driveway and some general areas, I can still do without it. But when spraying "Cat's Claw" vine in the woods around my house; when trying to get rid of all the bermuda grass when preparing a new planting bed - or for anything else that requires some finesse and accuracy, this stuff REALLY helps. I find for most of my stuff I can use it about 1/2 strength (& sometimes 1/4) & save a few bucks. It shows easily on bare ground / dry & dead grass / driveway rocks / and concrete (edge). But it also easily washes off in a day or two of sun and/or rain. Sometimes within a few hours it's hard (at 1/2 strength) to tell where I've sprayed. If vegetation is lush and you're only wanting to spray part of it - use more. It's harder to see on just green vegetation than on surrounding ground, but even at 1/2 strength you can see if you look. I won't use it ALL the time, but I will have it available ALL the time for when it's most helpful.

I recommend it for spraying weeds and ants outside, although I don't know that I would trust it to fade if sprayed indoors even though its stated that its safe for that. I read the reviews prior to mixing it the first time and mixed it 1/2oz per 1gal. It was blue, although going from direct sunlight to shade (NM has over 300 cloudless days) it was difficult to tell if I'd sprayed in the shade. Going from shade to sunlight did not cause me to have the same confusion. I went back the next day to finish spraying, and I could tell what I needed to spray still, which was great. All of the blue disappeared eventually, some surfaces took closer to 2 weeks instead of 48 hours. I did mix it once at the 1oz per 1gal and that is very, very blue. It was easy to tell where was sprayed going from direct sunlight to shade and in reverse. At this strength I accidentally misted my shoes (wind shift) which caused faint blue speckles. The speckles have remained for over 2 weeks and don't appear to be fading. As a note, there is a warning that this can possibly stain, and my shoes (Wolverine tan boots with leather upper and manmade sole) definitely resemble that.

Don’t overuse. It’s shows up well. Good product. Love it!!

I had heard this stuff gets everywhere. I wore gloves and didn’t get a drop on my hands or arms, but I didn’t think about my feet! The color is good, and there was plenty for an 18,000 sf lawn. I wish the container was a bit bigger. I’d order this product again.

Helps to mark and keep track of where you have sprayed your products. Helps to reduce waste and over spray.

Works as it should. Found it dark which is what you want

Great but it seems to stain white items. It's a very concentrated solution.

This stuff is amazing. I used it for spraying my lawn and followed the instructions. I found you don't need nearly as much as it says and goes really far. I put 2 ounces in 4 gallons and it was almost too much. You can clearly see the spray pattern and won't miss any. I got some on the rocks and sidewalk. It was gone within a few days.

Excellent product