if you're really trying to keep her short, look into bonsai and root pruning.
it would definately help to upcan her and shake the dirt out, trim back the roots a little bit, and repot
a lot of people are scared of cutting roots, but I've done some brutal shit to MJ and soil is very, very forgiving
if you really wanna keep her short, and keep her in that 1 gallon pot, i suggest a fabric pot to help with root spinout when you decide to re-pot.
as much fresh soil as possible, using happy frog instead of FFOF, because the happy frog uses dolomite as well as powdered oyster shell.
when you think she needs food, topdress some ffof on there
when you water, don't do too much runoff or you will leech out the oyster shell buffers and get the same problem again. It's harder to do this with happy frog than ffof IMO.
to learn how to take clones do a search, and you'll find a method for you
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i like rapid rooters in a propogation tray with gel
others like rockwool in a prop tray with gel OR powder, you gotta read a tutorial
and some do bubble cloners or aero cloners
too big of a branch will be hard to root, i go with medium or small cuts, that I don't think will make good bud sites
don't be afraid of defoliating mothers, in order to keep em short Keep as much foliage as close to the root system as possible, so if she ever stretches you can cut it back and force growth out of the bottom of the plant, keeping it short