Finale Herbicide comes in a 2.5 gallon jug. The current price is $175.06 which includes free standard shipping within the continental US.
Herbicides like Finale are used at a certain amount of product per acre depending on the target weeds you have. You can review page 4 and 5 of the Finale Product Label to see the varying rates based on the target species and choose the one that fits your needs best. On average you will want to use between 40-100 gallons of water per acre; higher water volumes will be needed for thick/dense foliage on the property.
Yes, you can use Finale Herbicide to kill Poison Oak. You would use a rate of 3 oz. per gallon of water for weeds with height or diameter less than 6 inches, and 4 oz. per gallon of water if weed height or diameter is over 6 inches. For broadcast applications, you would use 4 quarts per Acre for plants less than 8 inches, or 6 quarts per Acre for plants greater than 8 inches. Please see the product label for complete application instructions.
Finale Herbicide is not labeled for crown vetch so we cannot recommend it for this.