A long time. For me, it took more than 2 weeks.
Sourdough bread's mild level of acidity will discourage the growth of most mold species. We leave my sourdough loaves out of the refrigerator and the loaves will get eaten up in a week but they never grow mold.The time required for sourdough or any bread to mold depends on that particular bread's level of acidity, the humidity and temperature of the room, and whether it is well wrapped or allowed to become dry.
It depends on what kind of bread it is!!!
It takes about a week
about 4 days
12 to 14 days
about 9 days
50,000 years
Mold can still grow on bread in the freezer, but it grows more slowly at low temperatures. It can take weeks to months for mold to start forming on bread in the freezer, depending on the specific conditions. Regularly check your frozen bread for any signs of mold growth.
it takes 7 days if left out
24 hrs .
5 Days after its expiration date.
If you have dampened the bread then put it in a cool dark place, then wait about a week or so.