Definitely. As mentioned you don’t even need to adjust at all. Soil has the ability to neutralize the acids or bases in your water to preventing pH fluctuations. So your water pH of 7 is going to have almost no effect on your soil pH.
That said, while not common, a bag of soil could have some shit pH to start with. But once again you’re not going to drastically change the soil pH with water and would need to add a base/acid to get the soil into range. Most of the time if bag soil is way off, it’s acid (maybe 5’s) and you’d need to add lime to bring it up. But this is not something you’d want to do during a grow as it needs to happen over months or years. Most likely your
FFOF is within an acceptable range.
You can do a simple test by just adding vinegar and baking soda to your soil (separately) in a jar. If it bubbles or fizz with vinegar the pH is high. If it reacts with the baking soda, pH is low. (Strong reactions means it’s more acidic/alkaline.) Or you can do a slurry test if you have a well calibrated pen. Info online on how to do a slurry test.
Your yard soil is a different story. It could be way off. Once again you can home test, but best to have your soil tested. It’ll be the best $20 you spend on a grow if you’re in the ground. And then you’ll also know what kind of fertilizers you need and not be fiddling around with feed/pH all summer,
Routine Soil Analysis - Order Form for Home Grounds and Gardening To submit a sample to the lab, download the appropriate form and follow the sample collection guidelines provided.
www.umass.edu