Trying to grow my first autoflower

(24.03.10.) The plant is still not flowering, which means the strain is not what I thought to be and is actually a photoperiod. To amend this, lighting will be switched to 12/12. Also, the plant has some kind of deficiency for sure, Im suspecting potassium deficiency. It received veg. fert. on 02.27.1.3 ml/l, then received 3.33 ml/l on 03.06., at (mostly) every second watering. Humidity is too high, the fan must be switched on more frequently. 2 stems on the left was topped because they were growing too fast compared to other stems. Some of the lower leafs was removed.