diatomaceous earth and vinegar

diatomaceous earth and vinegar

I have a few questions about these things…and thought I’d ask you experienced gardeners what you think…

Diatomaceous earth:
Have you used it before? With what kind of results? How often did you have to apply it?
(I’m hoping to control some ant populations that I suspect are farming aphids around my favorite flowers).

Vinegar:
Same questions as above, but specifically, I’m curious about it’s possible success in killing turf instead of weeds. (I’m in the process of de-grassifying my lawn but want to forgo chemicals such as Roundup.) I also wonder how much may leech into the soil and kill desired plants.

Thanks in advance for your expertise and opinions.

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