To provide some perspective; I harvested & planted seeds in the fall of 2008. Here's a pic of the seedlings on March 8 of 2009:
... and here are 2 of the seedlings from Dec 1st (3 days ago):
So, roughly 2 years and a month or 2 - to get to this size ..... (the pots in top pic are 1.75" dia and last 2 are 2.5" diameter).