How long does it take for mold to grow on pizza?

Mold growth depends on several factors, including temperature, moisture, and the presence of mold spores. Pizza provides a favorable environment for mold growth due to its composition and moisture content. At room temperature (around 20-25°C or 68-77°F), mold can start to develop on pizza within 24 to 48 hours if left uncovered or exposed to humid air. However, the growth rate can vary based on the type of mold and storage conditions. Refrigeration can slow down mold growth, but it does not prevent it completely. To minimize the risk of mold growth, it's best to store pizza in an airtight container in the refrigerator and consume it within a few days.