Minecraft wiki entry for Cactus_farming, associated text: Cactus farming is the systematic planting and subsequent harvesting of cacti. Cactus farms are useful for acquiring green dye by smelting the cactus blocks or for storing experience in a furnace due to its high XP output when smelted, though it does not produce nearly as much XP when smelted in Bedrock Edition. Efficient, productive, and interesting farm configurations can be achieved with the creative placement of water source blocks and sand.