The natural pH of rainwater is....

5.7

Stone-fact. That's the natural stochiometric balance of water and CO2, which is mildly acidic.

Atmospheric pollutants cause many rainfalls to be more acidic than that, but almost never more basic.

Go ahead... discuss.

Im sure that ph can vary based on your location and stuff like that. But it makes sense that rain water is acidic, with what gets released into the air.

The thing people should wonder about, especially soil growers, is .... why are they pH'ing their water to 6.5, when a wild MJ plant has never seen water anywhere near this pH? Less than 5.7 on occasion; but never more.