ok im growing 11 plants, in a 4x6 flood tray, 6 og kush, 3 strawberry blue, and 2 cheesexhaze, now my question is this, on the packets it says, for example
OG kush (yield indoors 350-400m2)
Strawberry BLue(500-600m2)
what exactly is m2, sorry if this is a dumb question but i couldnt seem to...