Hashyanswered grow question 3 years ago I would say you got 3 to 4 weeks left easy. You will probably be ready to start flushing when your away. If you can find a way to flush them while your away would be good. If no one knows about your grow then keep it that way and don't get someone in to water. Look into a cheap gravity system you can try and set it up before you go away and then use it whilst away.