~ Update ~
This week has been tough my friends. The little ones are suffering from the cold temperatures this winter. But they are pulling through and looking better than they were a few days ago. I need to purchase a heating pad soon. I also noticed some fungus gnats, I tossed some sticky pads out to get the little buggers.
Much love guys, Meus
About an inch of sand on top of the pots keeps the fungus gnats away. They also look overwatered. I would report them in final containers to keep that problem at bey.
They look over watered. Do those solo cups have holes in the bottoms? Also you should get a small ceramic heater in there to warm it up a bit at night, 50f is too cold. Good luck with your grow!
Hey bro I had problems cloning like you're having. What I researched and figured out was that the clones were shocked by the environment change. Make sure when you transplant to soil that it is drenched in room temperature water. Also might want to keep the humidity dome on for a day or two and then leave it on for a few hours a day after transplanting. My last run of clones was 100% successful using this method whereas before I was having 25-75% of them die. At this point I would recommend spraying them with water (only) to keep them moist until they bounce back. Good Luck man!