Number 4 and a Zkittlez

AH Veg Week 9 (63 days old) AZ Bloom Week 4 (49 days old) Amnesia Haze: Is starting to show signs of what looks like stress and possible nutrient deficits. If you look at the leaves, they are starting to fold inward. A couple leaves have brown rusty spots on them and they are brittle near the tips. Considering the plant has been using this soil for 9 weeks now, I presume the nutrients have slowly been used up. To combat this, I will increase the BioGrow to 2ml/l and give her a top layer of Epsom Salt. Also an increase of CalMag from 0.5 to 0.7ml/l will happen with her next watering. Feel free to contact me with other suggestions if you have also had these issues! Amnesia Zkittlez: New Question has been uploaded, as her new growth is starting to look unhappy. The mature leaves are fine. Temps and humidity are relatively the same as they've been the past weeks: 20C / 50%rh so I take it it's not heat related. I can't imagine the increase of BioGrow from 1 to 2ml/l is the culprit, but what do I know. It shouldn't be due to overwatering, because she only gets watered when her soil is dry. That's once every two to three days. Crossing my fingers this gets sorted asap! AZ Update - 6 hours later: She's perking up again! Thanks to community members Lerome and AsNoriu for their suggestions! Both suggested Magnesium deficit and AsNoriu pointed to possible wind damage. Gave her 1ml/l CalMag and changed the fan setup in the tent. Both plants received a top dressing of bonemeal and epsom salt as well. Unfortunately, AH didn't like this and she's showing nutrient burns on the tips of the leaves. I think that's due to the increase of CalMag from 0.5 to 0.7ml/l. May have to flush her soon.