Originally Posted by walt501
Years ago I had about 3/4 acre of lawn that was full of dandelions. Local place sold me some concentrate (don't remember what) but also sold me some blue dye to put in with it once I'd mixed up a batch. Using a hand sprayer, I hit each dandelion. The blue dye was a real help in being able to tell which plants had been treated from those I had missed.


that could be helpful for being sure of coverage,

Something clever here.