Bottom leaf tips getting brown and dry symmetrical...

Hi @burrr, ! I can see that your ph is too high at 6.8 , you should low it around 6.26.5 because it is the average ph range. Ph plays a important role in nutrients absorption so take care of it. Your nutrients amount is good for that stage and not too high : 1ml/L with all mix (2 with light mix). Your temps are also too high as 34° in front of a glass window cause some magnifying effect. The bio grow is still the good nutrient at that stage but as soon as you get your first pistils you can switch to bloom but yoi should try to mix both bloom an grow in the transition week like 50%G/50%B then 25%G/75%B ! I hope it will help you

Hey hey, on a look and based on the photos, these symptoms look like the hallmarks of early stage nutrient burn. Not sure how much you’re feeding them but you might want to consider flushing or at least a good “rinse” of your medium and then dial back the nutrient schedule to every other watering. Otherwise, she’s lookn great and coming along nicely. Reach out if any other questions and good luck with it! 👊👍👊