Originally Posted by beta
In my experience bosai / dwarf / rootbound plants do indeed yield much less unless you let them grown out to full size in a big pot before you flower them.
I've found this to be true as well. Once the plant has been in bonsai mode for a while, it takes a few weeks for it to get back to regular growth rates.
Prune the roots as if you were refreshing the soil, then transplant to the larger container. A good veg nutrient profile and plenty of light.