Hey orangeman nice grow. A plant is considered mature when its nodes start alternating (instead of having a pair of nodes as they do when the plants are young , the plant will starts alternating nodes when it reaches maturity) just for your future reference. It is best to wait until the nodes start alternating to flower, because the plant isnt mature if the nodes are not alternating. This only apply's when growing from seed because a clone is always as mature as the parent plant. I been meaning to comment on your grow just got a lil side tracked lol.