Question.. Time to re-plant my 3 1/2 week year old plant?

First ever plant... I am incredibly curious as to what this may become... Anyway, I Germinated a seed between damp paper towel, and planted on july 14th. I place it in various places around my house each day (follow the sun) I bring it inside and place it under a single CFL bulb inside a white box. (I figure this is better than nothing) Many will say this is not worth the minimal effort.. Anyways I was wondering if she (hopefully) is ready to be transplanted into a larger pot?

It would be a 3 and a half week old plant for your thread title .....and I think your fine for a bit still .....

Ya your good for now. Should invest some time and money otherwise you results will reflect it.

Keep it in that pot until you can determine sex via pre-flowers, which should be in another 2.5 - 4 weeks (5th or 6th node). There's no point in unnecessarily transplanting a potential male into a larger pot. Shit, I've grown four plants at a time in a pot that size until sex was determined.