I just found out I can place a water source next to a cactus and it won't destroy the cactus. I would also like a block next to the cactus, but I have no idea what transparent and non-transparent blocks I can place without breaking the cactus. Could someone help me find out?
minecraft-java-edition – What Blocks Can Be Placed Next to Cacti in Minecraft Java Edition?
minecraft-java-edition
Related Solutions
The trick is that you need the blocks to be adjacent to where the cactus will grow. This works because cacti cannot tolerate being adjacent to other blocks - they break off instead.
This tutorial has some good pictures and illustrates a farm with water to gather the fallen blocks automatically.
Place a piston 1 block above the water, with a redstone torch diagonally 1 down and 1 in the direction the piston is facing. Place solid blocks to the same side of the piston and redstone torch, and then place a piece of redstone dust on the lower cobblestone:
You should then place your sand on top of the redstone torch:
You could build this 2 further down, but you'd have to deal with making sure the water doesn't wash away the torch or redstone dust.
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Best Answer
Upon testing, the following blocks can be placed next to a Cactus without breaking it.