How long does full colonization take?

Full colonization of a PF jar can take anywhere from 2 to 5 weeks, depending on your own factors. It can vary widely, so don't use these as scripture when evaluating your own setup. A good rule of thumb to determine full colonization is the time it takes for all the sides of the jar to become covered with mycelium, and wait 1 week after the outside is fully colonized. This will allow for the inside (which has less access to CO₂release/fresh air) than the outside layer does, and takes longer.