Roots

Hey guys,quick question,how do you really know when your plants are rootbound???my girls are doing so good I dont want to transplant them and fuck it up,I know they probably need it....there 11 inches in a soilless mix,sphagnum and perlite,1 gallon pot,and bushy as hell.im gonna flip them in two more weeks.i know there gonna get huge when I flower them,but can they finish in a 1 gallon pot???anyone done this???

Yes they can finish in a 1gal pot.

they can be like three foot in a gallon pot?also how do you realy know when they need to be transplanted???and do i just keep cutting the roots that come through the drain holes?

anyone??????

come on guys,no ones done this???