diff --git a/TrueCraft.Core/Logic/Blocks/CactusBlock.cs b/TrueCraft.Core/Logic/Blocks/CactusBlock.cs
index ed9d9c9..bc8e0cc 100644
--- a/TrueCraft.Core/Logic/Blocks/CactusBlock.cs
+++ b/TrueCraft.Core/Logic/Blocks/CactusBlock.cs
@@ -1,5 +1,12 @@
 using System;
+using System.Linq;
+using TrueCraft.API;
 using TrueCraft.API.Logic;
+using TrueCraft.API.World;
+using TrueCraft.API.Networking;
+using TrueCraft.Core.Entities;
+using TrueCraft.Core.Logic.Items;
+using TrueCraft.API.Server;
 
 namespace TrueCraft.Core.Logic.Blocks
 {
@@ -23,5 +30,79 @@ namespace TrueCraft.Core.Logic.Blocks
         {
             return new Tuple<int, int>(6, 4);
         }
+
+        public bool ValidCactusPosition(BlockDescriptor descriptor, IBlockRepository repository, IWorld world, bool checkNeighbor = true, bool checkSupport = true)
+        {
+            if (checkNeighbor)
+            {
+                var adjacent = new Coordinates3D[]
+                {
+                    descriptor.Coordinates + Coordinates3D.North,
+                    descriptor.Coordinates + Coordinates3D.East,
+                    descriptor.Coordinates + Coordinates3D.South,
+                    descriptor.Coordinates + Coordinates3D.West,
+                };
+
+                foreach (var coords in adjacent)
+                    if (world.GetBlockID(coords) != AirBlock.BlockID)
+                        return false;
+            }
+
+            if (checkSupport)
+            {
+                var supportingBlock = repository.GetBlockProvider(world.GetBlockID(descriptor.Coordinates + Coordinates3D.Down));
+                if ((supportingBlock.ID != CactusBlock.BlockID) && (supportingBlock.ID != SandBlock.BlockID))
+                    return false;
+            }
+
+            return true;
+        }
+
+        public void DestroyCactus(BlockDescriptor descriptor, IMultiplayerServer server, IWorld world)
+        {
+            var toDrop = 0;
+
+            // Search upwards
+            for (int y = descriptor.Coordinates.Y; y < 127; y++)
+            {
+                var coordinates = new Coordinates3D(descriptor.Coordinates.X, y, descriptor.Coordinates.Z);
+                if (world.GetBlockID(coordinates) == CactusBlock.BlockID)
+                {
+                    world.SetBlockID(coordinates, AirBlock.BlockID);
+                    toDrop++;
+                }
+            }
+
+            // Search downwards.
+            for (int y = descriptor.Coordinates.Y - 1; y > 0; y--)
+            {
+                var coordinates = new Coordinates3D(descriptor.Coordinates.X, y, descriptor.Coordinates.Z);
+                if (world.GetBlockID(coordinates) == CactusBlock.BlockID)
+                {
+                    world.SetBlockID(coordinates, AirBlock.BlockID);
+                    toDrop++;
+                }
+            }
+
+            var manager = server.GetEntityManagerForWorld(world);
+            manager.SpawnEntity(
+                new ItemEntity(descriptor.Coordinates + Coordinates3D.Up,
+                    new ItemStack(CactusBlock.BlockID, (sbyte)toDrop)));
+        }
+
+        public override void BlockPlaced(BlockDescriptor descriptor, BlockFace face, IWorld world, IRemoteClient user)
+        {
+            if (ValidCactusPosition(descriptor, user.Server.BlockRepository, world))
+                base.BlockPlaced(descriptor, face, world, user);
+            else
+                user.Inventory.PickUpStack(new ItemStack(CactusBlock.BlockID, (sbyte)1));
+        }
+
+        public override void BlockUpdate(BlockDescriptor descriptor, BlockDescriptor source, IMultiplayerServer server, IWorld world)
+        {
+            if (!ValidCactusPosition(descriptor, server.BlockRepository, world))
+                DestroyCactus(descriptor, server, world);
+            base.BlockUpdate(descriptor, source, server, world);
+        }
     }
 }
\ No newline at end of file