preflowers is not the start of flowering, u will see preflowers at each node and then once u see a cluster of pistils at the top of ur plant it has begun to flower"budding" - flowering has already started my friend lol- pre flowers are just that - usually start bout the 4th week of veg....just reveeling the sex of the plant....your already into flowering, lots and lots of calyx building up to make a bud...