Poast is the same thing as Vantage if it is from the Whitetail Institute..Be careful there is also another product on the market called Vantage which is a glyphosate (herbiced class that round-up is in). So if you use the wrong Vantage it will burn your clover down. Vantage labeled for the Whitetail Inst. is for spraying clovers. Poast has been a widely used vegetable herbicide used for years now. Poast or Poast Plus should be easily available from your local CO-OP. Poast I belive should be cheaper than Vantage