Also, growth rates can be dependant on how you mounted it to the frag plug or the rockwork. If the coral has to grow over a void area it will usually be painfully slow. That's why I often make a little ring of epoxy that I put down between the frag plug and the rock work to make a bit of a slope for the coral to grow on to. Like a boat ramp for the coral
That usually really aids in the chalices growth. I also feed weekly with either LPS pellets or PE Mysis. Shut the pumps off, get a little food juice in the water and leave the tank for 15 minutes or so (all tanks will vary and the inhabitants will learn to respond quickly with feeding tentacles if you do it regularly). Come back and spot feed the corals
I have definitely had some chalices grow painfully slow, usually the expensive ones. But that can also be linked to the size of the original frag. A frag with one mouth will take much longer to grow than one with 5+ mouths.
Just my 2 cents.