They will flower when the light cycle becomes 12 hours day/ 12 hours dark. If you have some bag seed from some mexican swagg, you will more than likely get a sativa dominant strain, meaning they will take a while to finish. I've planted bagseed from swagg when I was younger and some of the seeds were sativa's and some were indica, so you never really know what you are going to get. Also got some hermies I would just pick a few spots, plant some bagseed and see what happens. You will have smoke for sure though. Next grow, get some good genetics, it really is worth the price.