well alot depends on the strain on how long it will take, but roughly 5 months or so....but brah, if u live wit yo momz, and she totally against weed, it might b veryyyyyyyy difficult to grow some, or r u gonna b goin it outside some where....once in flowering, she will prob start smellin it, especially at dryin time, unless u have a big house and good ventelation.. seriously i wouldnt grow it at ur momz crib, ur pretty much askin to get caught.