i think multigrain will grow faster because it has more chemical and proteins.
Sourdough
sourdoogh
Bread
Wet bread
Bread.
bread of course...
bread
bread
Bread with Peanut Butter.
wet bead
Pasturage Farm's Marble Rye Swirled. It molds in about 2 and a half weeks
by letting air get to it Also, it will grow if it is put in a dampish, wet, and place without a lot of light.