If you are doing a organic grow, then a pH of 7 is fine. The fungi in your soil helps to lower your pH, the bacteria raise it.
With organics you have a broader range of pH to work with, since the microbes in the soil work hard to break things to where the plant will uptake the nutes when available. And if you look at a nutrient uptake chart, you can see that nutrients become available to plants in different pH ranges.
I water my plants sometimes with organic tea's that I do not pH but have had a pH of 8.0 or slightly higher with no ill effects on the plant.
With tea's you have 3 types you can make: Fungi dominant, Bacteria Dominant, or Balanced.
Adjust and make your tea's to what your plant needs. Fungi: to lower the pH. Bacteria: to raise the pH. Balanced: when o.k.
When you first start your grow get your fungi population up high. It takes a little longer for them to get to a good stable population, bacteria explode and populate very quickly, so give your fungi a head start.