Scorch was about 16 at 9 months and grew to 20 by the time she was a year old and now at a year and a half she is not grown in length in the last 6 months but is getting wider, her head is growing allot right now, she is getting ready to shed it again and it just shed a month ago, which is a sign of growth.
https://www.beardeddragon.org/forums/viewtopic.php?p=996256
Re: How long until he's full grown? yea, i agree is it 9 months or did you buy it 9 months ago. we rescured one and its 10 months old and at 14 inches, and she had problems, but agree with top about the 1st year is leingh and the 2nd is bulk.
https://www.beardeddragon.org/forums/viewtopic.php?p=996256
The chart below shows the max size based on the type of bearded dragon, but keep in mind that most dragons will not grow to be as big as their max size. 1  Pogona Vitticeps - 24 Inches. 2  Pogona Barbata - 24 Inches. 3  Pogona Minor Mitchelli - 18 Inches.  Pogona Minor Minor - 14 to 18 1  Inches. Pogona Nullabor - 14 Inches.  Pogona Henrylawsoni - 12 Inches.
http://www.thebeardeddragon.org/bearded-dragon.php
5 to 8 Years - This is the max age bearded dragons get in the wild and is generally how long a dragon will live if their owner just does the basics and doesn't pay any attention to their bearded dragon's diet Learn about the bearded dragon's health and diet. or health.
http://www.thebeardeddragon.org/bearded-dragon.php
Bearded dragons reach sexual maturity between the ages of 8 months and 18 months. Determining the gender of your bearded dragon before maturity isn't easy. When grown, males are larger than females, with notably bigger heads.
http://animals.mom.me/long-before-bearded-dragons-fully-grown-8850.html
Bearded Dragon Hatchlings. Female bearded dragons lay clutches a few times a year, averaging about 20 eggs in each clutch. When the hatchlings emerge two to three months later, they are about 4 inches long and weigh less than an ounce. Within two months, they are twice their birth size.
http://animals.mom.me/long-before-bearded-dragons-fully-grown-8850.html
Bearded dragons can live over 20 years of age if they are properly taken care of but over 30 is kinda pushing it. Actually 20 years is really pushing it. Prior to the recent s…urge in breeding of dragons they lived about 12-15 years if well cared for.
http://www.answers.com/Q/How_long_does_long_bearded_dragon_grow
Bearded dragons can live between 7-14 years. That is only if you  look after them well.   If you just do the bare minimum, they will live about 5-8 years.  With good car…e they can live 10+ years.
http://www.answers.com/Q/How_long_does_long_bearded_dragon_grow
8 to 12 Years - This is the likely lifespan of a bearded dragon that is kept healthy and is watched closely by their owner. 12 to 14 Years - Generally the max lifespan of bearded dragons that are kept in captivity.
http://www.thebeardeddragon.org/bearded-dragon.php
The average is 15 to 18 inches - however, there are exceptions.
http://www.answers.com/Q/How_long_does_long_bearded_dragon_grow
how long before a bearded dragon starts to grow
A bearded dragon starts to grow between the ages of 8 months and 18 months.