well i'm not too experianced with growing but i would move the plants before the roots get too big specially if there is 5 in a container.... i would move each into a 1 gallon bucket 5 plants=5 buckets. BUT..... i would wait for some imput from other people before you do anything because i may be wrong
I think you should have grew the seeds separate cups .. its easyer in the long run so you dont have to transplant it in a different pot later .. it might be more difficult to transplant 5 seeds it they are all next to eachother ..
its been about a week that theyve been growin theyre like 3" tall i got a clear container i can see the root on the bottom turning it already hit bottom
if you can do it now id say go for it, you dont wanna wait to long and have all the plants roots grow together, itd be much harder to transplant it then and youd stress the plant more