Will vinegar kill roses marigolds and perennial hibiscus?

I tried a formula that was suppose to kill weeds and grass because i was trying get away from herbicides.

I used 5% white vinegar and a small amount of soap. I used a dial a spray set at 8oz. which will put down the heaviest amount. 4 applications later i still had the weeds that included some wild daisies, grasses, purslane and sandburs. It did not do a thing.

Now i believe straight vinegar would but not if you tried what i did and you had some wind drift.

Thats my five cents worth

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