I can see results in 24 hours when I spray. This is on things like johnsongrass, ragweed, pigweed. I'm using generic glyphosate at 2%, adding 1% ammonium sulfate, and adding .5% crop oil spreader/surfactant. Ammonium sulfate is about $20 for a 50lb bag. The spreader is about $50 for a 2.5 gallon jug. I bought generic gly yesterday for $37.50 for a 2.5 gallon jug.

Use AMS & a surfactant.