Day 45 auto night queen, bio bizz all mix soil and bio bizz nutrients, what do you think is happening? Lower leaves first now its spreading to the middle leaves, my biggest fan leaves are getting wiped out and new growth at the bottom is suffering next to the pop corn buds
Calcium, magnesium, potassium; one of or a combination of any of them. Bottom fan leaves that dont get much light die off naturally. My last run i had plants with completely green fan leaves falling off the bottoms. If the plant is hungry for something, it pulls that nutrient from the lower fan leaves before they die off.
I talked to Biobizz & they say all mix is too hot for autos. You should be using light mix. Just my 2 cents
If the issues are starting from the bottom and moving upward it's a sign of mobile nutrient issues. This link to a thread I started has pictures of live plants with deficiencies and toxicity, which helps more than drawings imo. Common Nutrient Disorders Reference Guide (pics of live plants!)
I've talked to biobizz too and they recommended light mix for Cannabis seedlings. They don't see any problems with autos and their all mix