How fast do they grow?

I know this question will depend on a number of different things, but on average, how fast do hoggies grow? Our female is about 15 inches long and we're not too sure on how old she is. About how long are they at a year and how long does it take for them to be fully grown, I'm assuming about three years?

Umm, well it depends on diet, type of hognose, if she brumated, etc.
Most hognoese by the time they are 1 year can be around 6 to 12 inches long, depending on how much they feed. By two years they are pretty much full grown but kinnda skinny and then rapidly put on weight as they reach sexual maturity. It's different for evey snake just like it is for people.
General rule of thumb is by around 2 years they are fully grown.

When they're younger they shed every month, but as they get older they shed a lot more slowly (my Hogger hasn't shed since June-he's a year-old now).