I've tried a few ways with my autos. 3 inch peat to 6 inch peat, then into 5 gallon smartpot. Also start at 6, then final. Lastly, I got the seedling up for just a few days in peat, then into the final (this is how I grew Bubba 2). When using the peat in all methods, I very very carefully cut away the pot before setting it in larger container. Don't sneeze...you want minimum disturbance to roots when attempting this. All 3 ways worked well...just remember if you go from very small to very large, the seedling may seem slow (and tiny) initially, but I found with my Bubba that it definitely picked up steam and continued through grow. And just water sparingly at first until you sense that it can handle more (subjective assessment). I would probably recommend the 6 inch to final, but again it really depends on how well you handle the transplanting. Good luck!