HELP!!!
In the last few days, I have noticed an acute nutrient deficiency in the leaves. I have tested the PH value of the solutions and it is clearly too high. I can lower it with vinegar, but does it have any disadvantages?
Vinegar works OK as a temporary solution but I dunno if I'd use it long term for pH control. Vinegar is harmful to beneficial microbes. Vinegar isn't buffered so as it breaks down you could experience pH swings at the soil level. It's also a relatively weak acid, depending on concentration you may need to use substantially more than you would a real pH down product.