So I started with 4. One has already not made it. 2 are looking good so far. The tap root is at the bottom of the Rockwell already. The last one is struggling to come up. I don’t know if she will make it. I will keep watching her and hope is comes up.
The plants look good, but as these are autos you should get them out of those Solo cups ASAP. The roots find the limits of the cup and the plant gets stunted and won’t grow much further. Last year I found two weeks was too long and have switched back to peat pots instead. Good luck.
@Northern_Ent, they are all moved to the bigs pots now. I did it on Monday, so right after I took the photos I moved them. They are all getting much bigger now. Thanks for the tip