Should she be taller as an Autoflower? - day 18 10 cm

Let's say she could be taller..... What about your PH? Sometimes the nature of the seed is like this but most of the time it is on us. In this case I see the light colour of the leaves that means nitrogen deficiency. Nitrogen needed to grow properly and in this case I think the problem is the nitrogen. She will flower soon. I highly recommend higher dosage of bat guano or whatever that can provide good amount of nitrogen. PH imbalance also causes this that's why I asked because the plant roots can not absorb nutriteint when the PH is improper. Hope helps. :)