Rather than transplanting, BushyOldGrower (BOG) cuts the bottom out of the present pot, and places it in a larger pot partially filled with soil.
This image shows this technique, with the smaller pot having had its bottom inch removed.
The double potted plant is now ready to put on some new roots.
buddha fett :) makes a cut along the bottom and tapes it back up before he starts his plants to limit stress.
Finally, a new spin on this Bushy Old Technique by Overgrow contributor eugene, who transplanted this grow bag onto a trough filled with soil. Its now ready to grow and SCroG.