Nice, naming your plants is a must!
One thing you might try when you use clear cups is to put them in a second colored cup so the roots don’t get too much light & you can still pull them out if you want to see roots. Might be Interesting to do a test to see if you get more root development in the second cup.
Labeling is a must! And usually the other cups block enough light. And second cup is if it's on a high light side of the rack. But if it's growing right? And it won't hurt roots with light. But get it good and root bound and then transplant!
But read back... Got it all earlier here.
Perhaps I will run a test with my next babies to see if there is a difference in rooting time or plant health
Everyone I tried came up with no result. Roots only grow so fast.
But I'd like to see more research on lots of fun projects.... Keep it coming!
Ya it’s a very simple test to compare. Cheap as a plastic cup
Name credit for @cryptosludg