I'll prefice this by saying I have no experience with clones... However, other threads have led to me to believe that early on clones will grow very slowly and even yellow as they are converting all energy into growing roots. Once the roots are setting in, the clones should grow at a normal pace under your grow conditions for a plant of that size which was started by seed. I hope this helps, and I'm sure experienced clone growers will correct me if I'm wrong on this one.