I got a question about making soil more acidic. Is it alright to use
cooking vinegar and dilute it to water rhododendron?

Would you like fries with that....?

I think that the only way to permanently imrpove the soil is to replace it in a
localised area or amend it with soemthing that will have a long lasting effect.


The suggestion of using acetic acid is a novel one, and I don't know the answer
to that.

If your rhodo starts to look chlorotic, I'd try the Miracid route first and
then if it still has problems, remove the soil immediately around the plant and
replace it with more acidic potting mix of some sort.

I suspect that any effect of vinegar (and probably Miracid as well) will be
temporary as long as the substrate is alkiline.