So I picked up a blueberry bush from home depot and put in a large pot with some standard potting soil. I did some research on growing them and come to find out they like acidic soil so my question is, what is the best way to go about adjusting the ph for them? Ideally I would have amended the soil but I didn't so I imagine that just adjusting the ph of the water would work fine too. I have a 30-10-10 plant food/soil acidifier but I really dont wanna hit it with any ferts yet since the potting soil is new and already nutrient rich as it is so what would I ph the water to at watering times to acheive the desired acidity?