I have seen some autos get grown outside that turned into monsters. I think the key is directly planting into the ground from seed. No planting in any pots and then transplanting them. I saw an auto one of the members on here grew that was probably 2.5 feet tall and 3 feet around and it was nothing but donkey dong colas. I wish I remembered which one it was. I had my best luck with my first batch of autos which was a mixed array of autos from 3 or 4 different breeders. I averaged about 3-4 ozs per plant.