just curious, did you make that chart? or find it somewhere? that seems... really slow. there are alot of variables that impact growth rates in an animal, including care, time of year and feeding. ive had a crested and an auriculatus hit 25g in 6-7 months. 35g at 10-12. most people say an ideal breeding size for ciliatus is 35+ grams, and 1+ year, meaning they can reach breeding size of 35+g in about a year. I have also had crested geckos that were still 3g at 4-5 months. during the winter.
if youre keeping your animal cold, it isnt going to eat much = it isnt going to grow
if you keep it warm, it will eat more = it will grow a fair ammount
if you keep it warm and you feed it as much as it will eat = it will grow quickly.