PaperMC/paper-server/nms-patches/net/minecraft/world/level/block/BlockStem.patch

--- a/net/minecraft/world/level/block/BlockStem.java
+++ b/net/minecraft/world/level/block/BlockStem.java
@@ -20,6 +20,8 @@
 import net.minecraft.world.phys.shapes.VoxelShape;
 import net.minecraft.world.phys.shapes.VoxelShapeCollision;
 
+import org.bukkit.craftbukkit.event.CraftEventFactory; // CraftBukkit
+
 public class BlockStem extends BlockPlant implements IBlockFragilePlantElement {
 
     public static final int MAX_AGE = 7;
@@ -56,14 +58,18 @@
 
                 if (i < 7) {
                     iblockdata = (IBlockData) iblockdata.setValue(BlockStem.AGE, i + 1);
-                    worldserver.setBlock(blockposition, iblockdata, 2);
+                    CraftEventFactory.handleBlockGrowEvent(worldserver, blockposition, iblockdata, 2); // CraftBukkit
                 } else {
                     EnumDirection enumdirection = EnumDirection.EnumDirectionLimit.HORIZONTAL.getRandomDirection(random);
                     BlockPosition blockposition1 = blockposition.relative(enumdirection);
                     IBlockData iblockdata1 = worldserver.getBlockState(blockposition1.below());
 
                     if (worldserver.getBlockState(blockposition1).isAir() && (iblockdata1.is(Blocks.FARMLAND) || iblockdata1.is(TagsBlock.DIRT))) {
-                        worldserver.setBlockAndUpdate(blockposition1, this.fruit.defaultBlockState());
+                        // CraftBukkit start
+                        if (!CraftEventFactory.handleBlockGrowEvent(worldserver, blockposition1, this.fruit.defaultBlockState())) {
+                            return;
+                        }
+                        // CraftBukkit end
                         worldserver.setBlockAndUpdate(blockposition, (IBlockData) this.fruit.getAttachedStem().defaultBlockState().setValue(BlockFacingHorizontal.FACING, enumdirection));
                     }
                 }
@@ -92,7 +98,7 @@
         int i = Math.min(7, (Integer) iblockdata.getValue(BlockStem.AGE) + MathHelper.nextInt(worldserver.random, 2, 5));
         IBlockData iblockdata1 = (IBlockData) iblockdata.setValue(BlockStem.AGE, i);
 
-        worldserver.setBlock(blockposition, iblockdata1, 2);
+        CraftEventFactory.handleBlockGrowEvent(worldserver, blockposition, iblockdata1, 2); // CraftBukkit
         if (i == 7) {
             iblockdata1.randomTick(worldserver, blockposition, worldserver.random);
         }