Applied once every three months for a year. Poa Anna controll was deemed mediocre (in Burmuda), but other weed control was very good. Used REVOLVER at 1/2 oz per gallon (6 gallons for 6,000 sq ft) in the spring and got very good "knock-down" of Poa Anna.
Based on green up and growth alone this stuff works very well but I bought it for poa annua control so wont know until Spring. I checked soil temp and added 5lb/1000 sqft which is almost my yearly max for blue grass as I plan on using corn gluten in the Spring for crab grass. I will ammend my review next June.