Auto AK + Auto Blackberry Kush Indoors

The Blackberries have been in preflower for 5 days. They began showing sex and pistils on week 3. The AKs are barely showing sex without hairs on week 4. They barely smell. Stems are thicker and lateral branches are growing higher. At least 4 of the plants are showing some sign of nutrient deficiency, maybe Phosporus. Please, your opinion is welcome! Blackberry #1 specially is showing weird brown spots on the lower leaves and has been growing with its leaves some curling, others with wite patches. It looked pretty black on day 22, drooping, but it imporoved by itself on day 2. I will see if those signs cease after I give them their first nutrients tomorrow. ´ Update for DAY 25: BB kush #2 has been developing pistils for the past 4 days, although today I found 3 calyxes that look more like pollen sacks, 3 balls, 2 with hairs, all on the third node of the plant. From there, upwards everything is just hairs everywhere. It could be stress from light leaks maybe, or just a few pollen sacks that never fill? I plucked them off. I will keep an eye on this plant to see if she develops more, Ill have to take it out. What do you think? Is it possible to be just a false alarm?