My wife is a master gardener and tracks all the bio-friendly products we use. I mix according to the directions.

We also have a soil plan we worked with the County Agent and follow across the farm, especially with horse pastures.

There are occasions, however, when we judiciously apply Round-up like gentle plant emollients around the farm. :cool:

It ain't easy being green.

BTW, I showed my wife the sprayer in Steve's OP.

We bought two.