The only way for me to identify this plant would be for you to send me a few of the largest buds for analysis... There is no way to know. The broad leaves suggest an indica strain or indica heavy hybrid.

They look healthy enough. Note that if you are growing them with sunlight they will just keep growing until the fall. They will only go into flower when the days start getting shorter at which time they will be the size of a small tree. If you want them to flower stick them in a closet for 12 hours of dark / day.