Hey Silverhaze, What kind of northern lights is she ? Where did you buy your seeds ?
Anyway, I've grown NLs, before and it is excellent smoke, but mine was an autoflower, and it took 90days for her to get 20-30percent amber, but after she first started showing color, it damn sure didn't take her long before Amber was showing on every bud. So maybe when you start seeing some color on your buds , keep a close eye after that,
GoodLuck with yours.