I've still failed your bag growing class..and can't figure out how the lunch bag doesn't fall apart when it rains and it must take a lot of potting mix..How much potting mix do you add to each bag? Why not use cow pots or peat pods? I just can't understand how this works..seems like you're having to make a lot more work for yourself..I'm not knocking it because it obviously works for you but just don't understand how you make it work. I'm afraid I've failed this class.