Help with first grow

I have two SAD plants. They have been growing for 6 weeks.
I have no special set up just sun light. but have ordered 400w HPS just awating the ballast
Compared to others I have seen they dont seem to be growing as much as they should. They have strated to flower.
Will the new light make a difference or is it too late as they have started to flower.

They will love the new light. Might wanna start em out a little farther from light and gradually get them closer. Welcome to the balancing club. More light= more nutes = more heat= more ventilation= more dirt = more bud lol. Gotta balance those things plus more, it's a journey.

Thanks for the reply

They should start growing like crazy when they get under the hid. Mine shot up they loved it when I first put them under the hps.

They should like it..cafeful shocking them with it at first. This is a traing wheels grow so study all you can. best of luck.