Originally Posted by dutchmastr

I need help quick. My plant is truning yellow but not dying yet. And the new leaves are coming as if the plant is completely healthy. How ever the first set of leaves is getting yellower every day but no signs of dying. I fixed my pH problem and lowered the level and i havent seen any improvement. Anyone have any solutions i can try

Originally Posted by skunkushybrid

I've never come across that before... and the science behind correct ph levels and optimum uptake of nutrients has not been clearly defined, so I couldn't say for sure. Unless I took a degree maybe, and got myself a lab. lol.

I'd say though that plants will uptake nutrients at a specific level of ph, and that there should be no need to change this during flower...

Is there any evidence of changes in acidity levels of soil during the bloom period in an outdoor grow with nature doing all the work?