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