I started testing my runoff because my plants leaves started to yellow and die. My run off is around 5.5 and can not get it to go up I just flushed with a bunch of water phed at 6.5 and 7.0 it did nothing. what should I do, thanks for any help
Assuming that you're getting an accurate pH reading, garden lime is often used to raise soil pH. For a quick pH change, mix a very little hydrated lime with your next watering.