Normally the plant will tell you its sex when it starts to bloom which is near August.

If I were you I would leave the plant alone. It looks too small to even bother to force it to bloom. Wait until the weather gets better and the plant will get stronger.

After 3 months I would expect it to be bigger, maybe you aren't getting much light or the bag seed has poor genetics.

I think you should just let the plant run its course, let it veg all summer and in the end you will have a much better chance of getting a big yield in the end of October.

Why are you cutting off the light at 5pm and 'waking up at 5am' to lift off the cover. I understand that you are trying to force it to bloom, but why don't you just put the cover on the plant at 5pm and then take it off 'before' you go to bed and let the sun rise itself ?

Anyway, if you want to get a good yield you nee to leave your plant veg much more throughout the summer. You won't be sorry if you do this.

Growing weed is all about patience.

Don't bother with cloning until the plant gets bigger and use the bottom, lowest branches. let your plant alone and it will reward you. Take some clones in 3 or 4 weeks.

Take Care

S.L.