Trivia. 1  Mobs in contact with Cacti will make no attempt to move away. 2  Cacti cannot be grown using Bone Meal. 3  Cacti grow rapidly near waterbeds.  Items that come into contact with Cacti are 1  destroyed. The maximum height a Cactus can grow is 3 Blocks, however, Cacti can be found up to 5 Blocks tall. Like Chorus Trees and Sugarcane, if the block below the Cacti is broken, all blocks above it will also break. Any falling Block next to Cacti will destroy the Cacti itself instead of the falling Block.