First grow.... Advice plz! [Pictures]

Hey this is my first time growing [outdoor]..... Some of my leaves are curling up [1st pic] can anyone please tell me whats wrong with em'... i just thought that that the leaves is not getting enough sunlight.... but im not sure... the biggest plant is about 4 months old.... when is it gonna start flowering.... [im growing in a tropical area around the equator].... can any one give me any advices please... thanks..

They appear to be sativa's so it will take quite a while for them to bloom. Get them all the sun you can. The curled leaves looks like overwatering.

They will start flowering when they get 12 hours light and 12 of complete darkness!!!Only way,right now if they were outside they would do it on there own but inside you have to switch light to no light every 12 hours...