Yeah it's like 165 bucks for a gallon jug. At least it was last spring ? Depending on how much weeds are growing how many plants you got and how bad your infestation is of whatever you're trying to fend off.65$ on Amazon for that 32 ounces…I hope it works and lasts a year with that price …lol
But once you've got it all knock-back. If you had a bad infestation of something. Then a little dose of about a half an ounce to a gallon of water as a Pest management system. Once a week will do wonders and shit blunders for any outside grow. And I've used it as strong as 2 oz to a gallon. It can be a little rough on the plants when you use it that strong. But if you know your plants and what plants can handle that strong of a mixture you'll have no problem again.
Lol...Again it all comes down to trial and error. When you get to know all these things you can become an old grow old grower too... LOL