Ty both of you guys.

Im currently using a premade soil-mix that comes in a bag that sais:
Fertilized Soil with worm compost.
Contains: 80%soil /16% worm castings/ 2% rice / 2% sawdust
I dont really believe the N is a problem because of this.
Ive been trying to get perlite, but im having a hard time... il keep trying(i think i can get it at a pet shop cause they use it for water tanks)
Now: Is it ok if i transplant in flowering and add some perlite to the new soil?Because i wont be able to change the soil that is around the roots cause that WILL cause some severe stress during flowering.
So do we stick that the problem is the non-existence of perlite?