Burned tips.Yellow leaves

Hi smoke24, thank you for answer, but it s an autoflower in week 7 to 8 it s in flower already. Today i flush eith 2L of water after i test it i will write here ec and ph run off. I use biobizz schedule. Week 8 but i cuted like 10%-15% from it to prevent burning but still happend...

A couple things...is your runoff ph where it should be? Is there a reason you are using more bloom nutrient than grow nutrient during the plants vegetative cycle? The excess P and K in bloom nutrients are not needed before the plant begins the flowering cycle. I'd check the biobizz feed charts and make sure your amounts of each are correct. Happy growing.

All biobizz. Light mix soil Light electric sky 180 x2 15L pots, last feed 1.5 L each with: Bio Bloom 3.75 ml Bio grow 1.5 ml Top max 2.25 ml Bio haven 5.25 ml Acti vera 5.25 ml Alg a mic 3.75 ml Ph 6.5 humidity 50% 55% Tomorow i will flush with 2L water with 6.2 PH. I don t know what to do, burned tips but bottom leaves say they need something... i ordered solutions to recalibrate my ph metter. Thank you very much!