Green gelato auto 4x

Day 37: All girls making budlets, Nr4 Is longer in flowering mode, she almost stop stretching and making buds. She still has problem with yellow tips on tops. Maybe its caused by nutrient lockout from incorrect PH of water solution, iam not sure, but light is high enough now. I decreased nutrition to 1.5 ml/l of Alga Bloom, . Nr 2 and 3 still stretching, and show something like Ca def. Maybe its really nute lockout 😔 Last defoliation incoming.