Worked great as a post-emergent for Poa.

Very well packed. Delivered in perfect condition. Material is fresh. According to Syngenta, the batch I received has a recommended use-by date of 7/2022. Also, this material should be stored above 35°F. I like Princep because when applied for 3 consecutive springs, I can skip a year.

My lawn

This pre-emergent works very well against grass burs if applied heavily very early in the spring. When my grass bur problem was extremely bad I mixed 3 to 4 quarts with 50 gallons of water, surfactant and marking dye. I applied with a high pressure spray nozzle. I used five gallons of Princep to treat two acres. That is about 350-400 gallons of water to 5 gallons of Princep. I hit the densely infested areas with a lot of solution. If you want to get rid of grass burs YOU MUST treat your lawn three or four times a year. Some professionals will recommend six times a year. One year I thought I had the grass burs eliminated - Applied only two applications total that year and the problem appeared to be solved, and late the next summer the burs came back with a vengeance. Now I know the early Spring application is the most important. Late in the spring I apply a different product that is both a pre and post emergent. My soil is sandy loam and it seems the grass bur seeds become slightly buried by hard rains and are thus protected from the application. Multiple applications over a couple years seems to be the only fix to grass burs.

Great product great price