 Well, you've got the 30%. I wouldn't have bought it. I would have just bought the 20%. But since you have it, go ahead and use it. I'd use it first and just spray the Bermuda that's coming up through the mulch. You have full strength of 30%. If you want to make it even stronger than that, you can by adding a little bit of molasses to it, an ounce of molasses per gallon of the vinegar.