Paper-Old/nms-patches/BlockPlant.patch

--- a/net/minecraft/server/BlockPlant.java
+++ b/net/minecraft/server/BlockPlant.java
@@ -14,7 +14,14 @@
 
     @Override
     public IBlockData updateState(IBlockData iblockdata, EnumDirection enumdirection, IBlockData iblockdata1, GeneratorAccess generatoraccess, BlockPosition blockposition, BlockPosition blockposition1) {
-        return !iblockdata.canPlace(generatoraccess, blockposition) ? Blocks.AIR.getBlockData() : super.updateState(iblockdata, enumdirection, iblockdata1, generatoraccess, blockposition, blockposition1);
+        // CraftBukkit start
+        if (!iblockdata.canPlace(generatoraccess, blockposition)) {
+            if (!org.bukkit.craftbukkit.event.CraftEventFactory.callBlockPhysicsEvent(generatoraccess, blockposition).isCancelled()) {
+                return Blocks.AIR.getBlockData();
+            }
+        }
+        return super.updateState(iblockdata, enumdirection, iblockdata1, generatoraccess, blockposition, blockposition1);
+        // CraftBukkit end
     }
 
     @Override