It's cool that you are looking for ways to improve. I always do the same. I would say to transplant a larger fabric pot when ready. I don't like plastic pots anymore. Getting root bound sucks. Since you are growing outside the plant may turn into a monster and that pot could end up being too small.
It looks like there is a bit of yellowing and it does not look bad but it could be a sign to increase nutrients a bit. A healthy plant will be totally solid deep rich green.
looks healthy. 50 gallon pot? thats quite excessive if you ask me.. i think a 30 gallon would do just perfect. any perlite in your soil? if not i would recommend mixing some in with it. other than that it looks healthy!
Other pictures are from about 11 this morning
Picture from today showing light distribution
Picture from today showing her height compared to a 4 week old all natural plant
And I have 10% perlite in the mix but the soil I'm using doesn't have drainage problems, takes only 20 ounces before water is draining out the bottom of the 7 gallon container I'm using