Mid-life crisis?

When I saw tipburn I thought it's nute burn because with biobizz people always say don't go more than 1 ml Bio Grow with autoflowers in bb lightmix so I was afraid to use more but recently I am feeding them 3 grow 3 bloom they seem to like it and want even more. Grow is 4-3-6, bloom is 2-7-4. as you see most of the K is in bio grow so I like to use it for the last month. my plants just wants more. they are still fattening up.

Give her some food, I say. 2-10-15 npk or something along those lines. She should perk up and start stacking once she gets some meat on her bones. Good luck!

I'm with Roberts here... I think you mistook a potassium deficiency as nute burn... a good PK booster will help them bulk up and finish.... (you don't need a lot of nitrogen in flower...) Good luck

Looks to me like nitrogen deficiency and also heat stress , leaves will curl up and have burnt tips the bottom leaves will yellow more as the plant is pulling all the nitrogen it can to the top . Hope this helps 💚

Brown straight tips means it wanted more potassium. Brown tips curled up, and in is nute burn. You are still bulking as well. 👍