diff --git a/src/main/java/de/doggoat/growableRebalance/listeners/BlockSpreadEventListener.java b/src/main/java/de/doggoat/growableRebalance/listeners/BlockSpreadEventListener.java
index a2efa43..56a56ab 100644
--- a/src/main/java/de/doggoat/growableRebalance/listeners/BlockSpreadEventListener.java
+++ b/src/main/java/de/doggoat/growableRebalance/listeners/BlockSpreadEventListener.java
@@ -31,15 +31,17 @@ public class BlockSpreadEventListener implements Listener {
 
     @EventHandler
     public void onBlockSpread(BlockSpreadEvent e) {
+        // log.info("BlockSpreadEvent: " + e.getBlock().getType().name());
         switch (e.getSource().getType()) {
             case Material.KELP:
                 this.onKelpSpread(e);
                 break;
             case Material.BAMBOO:
+            case Material.BAMBOO_SAPLING:
                 this.onBambooSpread(e);
                 break;
             default:
-                log.info("BlockSpreadEvent: Source " + e.getSource().getType());
+                // log.info("BlockSpreadEvent: Source " + e.getSource().getType());
                 break;
         }
     }
diff --git a/src/main/java/de/doggoat/growableRebalance/listeners/GrowthEventListener.java b/src/main/java/de/doggoat/growableRebalance/listeners/GrowthEventListener.java
index 407ad9f..e178a14 100644
--- a/src/main/java/de/doggoat/growableRebalance/listeners/GrowthEventListener.java
+++ b/src/main/java/de/doggoat/growableRebalance/listeners/GrowthEventListener.java
@@ -1,4 +1,6 @@
 package de.doggoat.growableRebalance.listeners;
+import de.doggoat.growableRebalance.PlantUtils;
+import org.bukkit.Location;
 import org.bukkit.Material;
 import org.bukkit.block.BlockState;
 import org.bukkit.entity.Player;
@@ -6,6 +8,8 @@ import org.bukkit.event.EventHandler;
 import org.bukkit.event.Listener;
 import org.bukkit.event.world.StructureGrowEvent;
 import org.bukkit.plugin.java.JavaPlugin;
+
+import java.lang.reflect.Array;
 import java.util.logging.Logger;
 import java.util.Arrays;
 import java.util.List;
@@ -25,6 +29,16 @@ public class GrowthEventListener implements Listener {
     @EventHandler
     public void onStructureGrow(StructureGrowEvent e) {
         Player p = e.getPlayer();
+        Location ground = PlantUtils.getSingleBlockGround(e.getLocation());
+
+        if (unreplaceableBlocks.contains(ground.getBlock().getType())) {
+            e.setCancelled(true);
+            if (p != null) {
+                p.sendMessage("You cannot grow " + e.getLocation().getBlock().getType() + " on " + ground.getBlock().getType());
+            }
+            return;
+        }
+
         List<BlockState> forbiddenBlocks = e.getBlocks().stream()
                 .filter(blockState -> unreplaceableBlocks.contains(blockState.getBlock().getType()))
                 .filter(blockState -> dirtBlocks.contains(blockState.getType()))