It's not stunted ... it's just had it's internal clock messed up ... but that's a good thing because otherwise it would almost be done living at nine weeks ... I would either give it 24/0 or 20/4 or a varied diet of 24/0 and every three days 20/4 ... I'm aware of the biology of pot but at times a plant needs a rest ... especially here in Florida because of the heat ... Whatever bloom nutes you're using I would give her a shot of nearly full strength, she really wants to start stacking up the buds, just needs the right amount of P&K ...
if she doesn't start to pack on the buds it may be a sign that your LEDs are not that good for flowering ... mine are so I know LEDs can do the job ...
Pretty sure that stoned and drunken LST will eventually be an Olympic event ... I could win but I would probably forget to show up for the competition ...