The pH scale runs from 1 to 11, with lower numbers being acidic and higher number being alkaline. For soil, I believe the ideal level is around 6.5. You seem to be border-lining of that and 7+. When the pH rises in alkalinity above 7.5, the roots are not able to consume the available iron, copper, zinc, manganese, and boron ion in their vicinity. When pH lowers into acidity to less than 6, the root are not able to acces phosphoric acid, calcium, and magnesium because they lose their solubility. If the pH further drops below 5 then you may as well just water with bleach. Haha jk but it'd probably die. Hope this helps.