Cactus is a plant that naturally spawns in desert biomes and on the sides of some mountains. It is green with a spiky texture and can grow up to three blocks high. Players can harvest it without any tools, but it will damage entities, including players, if they come into direct contact with it. It can be used for crafting green dye, creating traps due to its damaging property, or as a defensive barrier around structures.
The numerical item ID for Cactus is 81
Numerical item IDs will only work in Minecraft versions below 1.13.
The item ID for Cactus is minecraft:cactus
This is the spawn command to give yourself Cactus in Minecraft which includes the Minecraft /give command. If you are using the Essentials plugin you will need to use /minecraft:give instead of /give