20/4 lights on at 150ish ppfd. Rooter plug had been in a jar fill 1/2 way with perlite sprayed lightly with spray bottle. After picking it up noticed that roots had already extended past the plug. Transplanted into a 4" square black plastic container filled with 2/3rds Coco Loco and 1/3 seedling mix. Light sprinkle of Mykos into hole before inserting plug. Lightly watered with a tiny drop of CalMag Fuel added to water. 2nd set of leaves are just coming up.