Looking very nice for there age just like mine do at that age. i would suggest if you only got one plant, go get 1 100watt (actual) CFL, this will do you nicely and will encourage your grow to come on faster. rule is 100watt per plant. dont use any chemicals/nutes at this stage as it can be fatal, however Bio-Bizz root juice (organic) is good to use at this stage as it encourages your roots to grow nice and healthy which of course makes your plant nice and healthy. i use all biobizz products and would recomend them! other than that, your plant is looking very nice, happy growing !!