Any ideas what can I do? • Leaves tips and edge...

Hello! My advice: Flush with pH'ed water & start over fresh. That literally saved my grow when my leaves turned 80% yellow & crispy in Week 7 (check my diary if you like). Your issue looks to be nutrient burn, either caused by overfeeding or pH problems causing lockout. Do NOT feed anything else right now--just flush the container until you get 30% runoff out the bottom & raise the light a few inches for a few days while the plant recuperates. This is the advice given for flushing on GrowWeedEasy.com & is the safest course of action when things are going rapidly downhill. Make sure your grow space is getting adequate air circulation & isn't too hot as well, as this can contribute to crispy leaves. Good luck!

I'm agreeing with all the toxicity and ph comments...just continue to flush with the best ph'ed water you can manage. In regards to the plants not being similarly purple, you could grow all of your purple bud autos at the same time on the same exact schedule, and most likely they will all display different traits, whether by looks or "smokeable traits", being auto you can't clone the best one...but just appreciate how unique they are. 😊 I think if you can get their temps down it will help bring out their colors. Great job with the grow. I love seeing the purple varieties. 💜

Florakleen first day, next 3-5 days water with ph 7.0 after that cal-mag will help you;)

Wat u have is a ph and nute and heat burn you need to flush this plant for 7 straight days with ph water at about 5.8 6.0 i would flush her with 2 ml of calmag also you still have a couple weeks i would not feed her anymore do 7 days with calmag and 7 days without it ph is the biggest part of this problem 👍👍🍻🍻