Had to repot earlier with these babes, their growth is out of this world. Seeds where planted in GL Light Mix while repotting was done with 60/40 substrate with some light mix too. I'm afraid that if I only use 60/40 only it might cut the roots when handling.
@6ix6ix6ix, just used it to avoid damaging the roots for transplanting. I think that until a root system is developed strong enough the harsh Coco will tear it up when it is handled initially