Agreed, up the micro and general nutes and also add a P/K booster.
Yep, 3 to 4 weeks left........... never believe what they lure you in with the advertising - it is all based on the best plant ever grown under OPTIMAL conditions with the best equipment ever and has no relationship to a person growing in their basement with a small light.
She is also probably stressed from growing at 21/3.......18/6 is optimum.....cannabis NEEDS adequate sleep and 3 hours just aint enough!
Careful with the peat moss content next time, it is quite acidic and for cannabis you only want 5-10% at most, 35% is too much.
For autos, about 70% soil, 20% coco coir, 5% perlite and 5% vermiculite (or just 10% perlite and no vermiculite, which can also be acidic) is about what I would consider as being more balanced.
Good luck and happy harvesting!