well i dunno bout yer area, but round here a 10 sack is a gram, 20 is 2 gramz and so on...a good thing to invest in is a digital scale so that you kno fer sure yer getting full countz...and as fer growin, look under the cultivation section of the board, theres a shitload of info frum experienced growers!
PeAcE N Happy Smokin