I'm beginner in growing and I don't understand what the problem with my plant

[wowwow5605]

I thought Power Roots and CalMag weren't the primary fertilizers and could be added in the first few weeks.

Am I correct in assuming I should...

[wowwow5605]

I grow 42 fast buds Banana Purple Punch Auto, I grow in small tent 0.5 square meter. I use led lamp 100w.
Grow in plagron grow mix (it has nutrients...