Don't use nutes until like 30 days into the grow. Your plants arent ready for steroids yet bro lol. Also...It's way to early to tell sex of the plant.
AND IF ITS AN AUTO, This thread is pointless then. All Autos are feminized...they dont even have a Veg stage of the grow, it goes from Seed > Sprout > FLOWERING.
Auto's take about 80-90 days from seed to harvest. So you've got a while to go buddy...
Also, if its bagseed, what makes you think it's an auto?
Most Auto Strains need to be purchased as seeds from seed banks, i highly doubt one just popped up in your bag..
Change that shitty soil, Read more on CFL growing.
I mean damn dude, those plants look like they've gone through hell and they arent even that big yet...You'd have better luck with miracle grow, than with soil thats been drained of its natural nutes over 5 years...
Sorry if this is coming off as harsh to ya homie, just trying to relay my knowledge.