i think multigrain will grow faster because it has more chemical and proteins.
Sourdough
sourdoogh
Bread
Bread.
Wet bread
bread of course...
Homemade bread molds the fastest. Other types of bread that will mold are breads that do not have preservatives, or bread that becomes too hot.
bread
bread
Bread with Peanut Butter.
wet bead
Pasturage Farm's Marble Rye Swirled. It molds in about 2 and a half weeks