Buy a Cowplant Berry from the Rare Seed Pack in Gardening
Find a Cowplant Berry while fishing or digging
Find a Cowplant Berry in space while exploring with the Rocket Ship
Find a Cowplant Berry in the jungle in Jungle Adventure
Grow the Cowplant Berry into a Cowplant
Use cheats to add a Cowplant Berry to your Sim’s inventory
Use the gallery or a mod that provides a Cowplant