Amazon.com : Jack's Giant's Elephant Ears in 4 inch Containers (3 Pots of Plants) : Patio, Lawn & Garden Drain Drawer Pots, Inc. Croton Mammy Panhandle Palm & Rock Mushrooms popping up in your houseplant soil? , No need for concern. Its actually a sign of good luck in some cultures! These little cuties are saprophytic fungi. Saprophytic means they get their Growing Pumpkins in Containers Food Gardening Network