Yeah, it would be a good solution to raise pH
I'm not sure whether the aluminum sulfate I mentioned can be added to water or not. I irrigate with rain water, which is naturally acidic, so treating the water is something I haven't considered. That brings me to another thought - Elaine, would installing a rain barrel be an option for you? Atlantic-derived rainwater is around pH 5-6, and it can be much lower if your clouds form inland, but I couldn't find info on the Gulf.
