GMSgrowsanswered grow question 4 years ago Hey. Nitrogen uptake it best at 5.5 to 6.0 anything 6 or above is for flowering time. I would test your ph tester.
I watch the stems of the leaves of my girls. If their not a purple plant by trait then the stems of the leaves should be green.when they start turning red or purple their telling me they need more food. But, you have to know their wanting more food and not turning red or purple because they can't take up the food that is there, do to lockout, salts building, or even to high ph that their not pulling in what they need. Happy growing. Cheers