now they are on 18/6 stable schedule...i've bought a timer.
they were under a very small light, 5W flourescent i think, it's possible that's the couse of variegation, anyway, only the top leafs have the pattern.
i'll try to find some nute with your specifications. in my country there isn't anything cannabis specific for buy in shops. about perlite i've tried to find but with no luck.
do you think the light is enough for flowering?
thank you very much for the answer.