Hi and welcome to Cann.Com by the way,
You want to flush your buds about the last two to three weeks of flower to let the plant use up its final nutes for taste and resin production. DO NOT ADD any ferts after flush period...this defeats the purpose of flushing.
You can find anything you want on here, just type the subject in search and it will pull it up.
Again welcome, and best of growing; be diligent and read up on all the noobie threads under basic growing. You will be growin your own meds in no tim:smokin: