Zazassanswered grow question 4 months ago I wouldn’t lower the PPFD. I would have around 600 on week 7, 700 on week 8, 750 on week 9 and 800 on week 10. That’s just a rule of thumb. I would just lower the PPFD if the plants show some sun bleach. And when it comes to VPD, I would strictly follow it but just make sure to not have to humid in the tent. I would have around 45-55%.