as above , they do get some birth marks from stucknseed helmets , leaf fusing ect... dont worry as the test of the growth is looking good. I t would be well worth looking at topping and using L.S.T to get the best sized vegging plant before flowering. this will get you multiple main stems to increase yield no end. It is simple to do and easy to follow.Many of us use it and show how in diaries too. dont be afraid to ask anyone here for advice /help . we are a friendly bunch. welcome to grow diaries