How long does it take dry cheese in a bag to grow mold?

Cheese does not grow from mold. Mold is a fungus that can contaminate cheese, but cheese itself is made from cured milk solids, rennet, and sometimes bacterial cultures. Mold growth on cheese depends on various factors such as moisture content, temperature, pH, and the presence of competing microorganisms. Typically, mold development on cheese stored in a bag can occur within a few days to weeks, depending on the conditions. Proper storage at low temperatures and low moisture can prevent or slow down mold growth.