You should be able to correct it with a good flush with the proper ph water. You can also continue to water/feed at an adjusted ph until the runoff is correct. Then proceed to use corrected water again.

Make sense?

Here is a sticky which the topic is explained more by someone with much more experience than me.

http://boards.cannabis.com/plant-pro...hy-how-do.html


I asked your soil type because some commercially available soils use certain ingredients that can gradually change the PH over time. Like pine bark chips.
GetThisOrDie Reviewed by GetThisOrDie on . Correct pH for soil... If your soil is either acid or alkaline, would you need to adjust your water/nute pH accordingly? For instance, my girls are suffering from lockout due to soil being slightly alkaline. In order for my runoff to come out at a pH of 6.5, I had to flush with plain water pH'd at 5.1. My question is, should I always feed/water with a pH of 5.1(+/- depending to run off)? Or do I continue to feed/water with a pH of 6.3-6.7? The goal is to have a soil runoff pH of 6.5 correct? I was Rating: 5