First Plant

Hey in need of a little help. my set up is pretty basic right now but my plant has thrived its about 45 inches tall its in MG soil and shes about 4 months old and smells great. she also hasnt crowned yet. and im starting to wonder if the stem is not strong enough to support the bud. now im gonna put some pics up soon but i jus wanna know wen should i re-soil it cuz she seems to be a lil stunted.

With standard pots the rule of thumb is 1 gallon of soil per foot of plant height. Smartpots or cloth pots are different though, you can go about twice that.

cool. few more questions. usually how long should it b b4 a plant starts to flower?
and how thick should my stem b?
and in soil usually how long would it take for it to b ready to harvest?

Indoors its always a size thing. When you switch to 12/12 figure the plant will double in size by the time it finishes.
It usually takes about two weeks to get started. As she grows so will her stalk. Takes around two months.

So he's going to have an 8' Tall Plant?

right cuz shes jus about to start flowering and shes 4 feet now

Yeah that's pretty tall for an indoor grow. Probably best to put her in a 5 gallon and bend her over and tie it.
You can drill holes in the container to tie the side branches but the main cola will need a weight or something.