PLS HELP!!! Seedling grown right on side of its small container

Hi everyone would just like to say a big thx up front.. Haha so ya the seedling is growing up the side of my small plant box of 4cm by 4cm where there is 6 compartments? So it is growing well and probably even the best of the few seedlings( grown indoor closet )? So j was just wondering when the best time would be to transport this seedling? I was gonna wait 3 weeks, but it's almost 1 week old and I'm scared that because it is growing on the side that it's root system is gonna be a lot smaller than it should be because it can kinda only growing on the one side towards the soil? What should I do? When should I transport it to it's final big pot? Rather sooner than later? Bigger root system bigger yield etc.? Or am I just over stressing as it is growing The best out of the 6?

if all is well, the roots will fill the space provided, and shouldn't be a problem. The best time to plant up is when the plant is nearly root bound, but as long as it has well established roots, you can plant up without a problem.


Grow well,
B.B.

i go up in stages with my pots, 1 or 2l to 4 or 5l etc, its too young to transplant your plant. wait untill the plant is over the edges of your pot if that makes sense, or look at the bottom and see if you can see roots, (root bound) if you can, needs a transplant but wont need one yet (i think depending on the size of your current pot) GW