I’ve been using avocado peels to make biodegradable planters. Why not? Once you’ve eaten the avocado you’re almost done!! Directions: cut an avocado in half so the two ends can be used as pots. Eat the avocado with a spoon, then clean the two halves with a scouring pad. Let them dry on a round form like the bottom of a glass. Then plant whatever you want inside!