diff --git a/src/main/java/world/bentobox/greenhouses/managers/RecipeManager.java b/src/main/java/world/bentobox/greenhouses/managers/RecipeManager.java
index c8c2a72..2389b1b 100644
--- a/src/main/java/world/bentobox/greenhouses/managers/RecipeManager.java
+++ b/src/main/java/world/bentobox/greenhouses/managers/RecipeManager.java
@@ -182,7 +182,10 @@ public class RecipeManager {
                         String[] split = conversions.split(":");
                         double convChance = Double.parseDouble(split[0]);
                         Material newMaterial = Material.valueOf(split[1]);
-                        Material localMaterial = Material.valueOf(split[2]);
+                        Material localMaterial = null;
+                        if(split.length > 2) {
+                            localMaterial = Material.valueOf(split[2]);
+                        }
                         b.addConvBlocks(oldMaterial, newMaterial, convChance, localMaterial);
                     }
                 } catch (Exception e) {
@@ -199,7 +202,10 @@ public class RecipeManager {
                 Material oldMaterial = Material.valueOf(split[0].toUpperCase());
                 double convChance = Double.parseDouble(split[1]);
                 Material newMaterial = Material.valueOf(split[2]);
-                Material localMaterial = Material.valueOf(split[3]);
+                Material localMaterial = null;
+                if(split.length > 3) {
+                    localMaterial = Material.valueOf(split[3]);
+                }
                 b.addConvBlocks(oldMaterial, newMaterial, convChance, localMaterial);
             } catch (Exception e) {
                 addon.logError("Could not parse " + oldMat);
diff --git a/src/test/java/world/bentobox/greenhouses/greenhouse/BiomeRecipeTest.java b/src/test/java/world/bentobox/greenhouses/greenhouse/BiomeRecipeTest.java
index b58304c..e9b0fbe 100644
--- a/src/test/java/world/bentobox/greenhouses/greenhouse/BiomeRecipeTest.java
+++ b/src/test/java/world/bentobox/greenhouses/greenhouse/BiomeRecipeTest.java
@@ -156,7 +156,7 @@ public class BiomeRecipeTest {
     }
 
     /**
-     * Test method for {@link world.bentobox.greenhouses.greenhouse.BiomeRecipe#addMobs(org.bukkit.entity.EntityType, int, org.bukkit.Material)}.
+     * Test method for {@link world.bentobox.greenhouses.greenhouse.BiomeRecipe#addMobs(org.bukkit.entity.EntityType, double, org.bukkit.Material)}.
      */
     @Test
     public void testAddMobs() {
@@ -168,7 +168,7 @@ public class BiomeRecipeTest {
     }
 
     /**
-     * Test method for {@link world.bentobox.greenhouses.greenhouse.BiomeRecipe#addMobs(org.bukkit.entity.EntityType, int, org.bukkit.Material)}.
+     * Test method for {@link world.bentobox.greenhouses.greenhouse.BiomeRecipe#addMobs(org.bukkit.entity.EntityType, double, org.bukkit.Material)}.
      */
     @Test
     public void testAddMobsOver100Percent() {
@@ -182,7 +182,7 @@ public class BiomeRecipeTest {
     }
 
     /**
-     * Test method for {@link world.bentobox.greenhouses.greenhouse.BiomeRecipe#addMobs(org.bukkit.entity.EntityType, int, org.bukkit.Material)}.
+     * Test method for {@link world.bentobox.greenhouses.greenhouse.BiomeRecipe#addMobs(org.bukkit.entity.EntityType, double, org.bukkit.Material)}.
      */
     @Test
     public void testAddMobsOver100PercentDouble() {
@@ -195,7 +195,7 @@ public class BiomeRecipeTest {
     }
 
     /**
-     * Test method for {@link world.bentobox.greenhouses.greenhouse.BiomeRecipe#addPlants(org.bukkit.Material, int, org.bukkit.Material)}.
+     * Test method for {@link world.bentobox.greenhouses.greenhouse.BiomeRecipe#addPlants(org.bukkit.Material, double, org.bukkit.Material)}.
      */
     @Test
     public void testAddPlants() {
@@ -207,7 +207,7 @@ public class BiomeRecipeTest {
     }
 
     /**
-     * Test method for {@link world.bentobox.greenhouses.greenhouse.BiomeRecipe#addPlants(org.bukkit.Material, int, org.bukkit.Material)}.
+     * Test method for {@link world.bentobox.greenhouses.greenhouse.BiomeRecipe#addPlants(org.bukkit.Material, double, org.bukkit.Material)}.
      */
     @Test
     public void testAddPlantsOver100Percent() {
@@ -267,25 +267,6 @@ public class BiomeRecipeTest {
         verify(b).setType(Material.CLAY);
     }
 
-    /**
-     * Test method for {@link world.bentobox.greenhouses.greenhouse.BiomeRecipe#convertBlock(org.bukkit.block.Block)}.
-     */
-    @Test
-    public void testConvertBlockNotInGreenhouse() {
-        // Setup
-        this.testAddConvBlocks();
-        // Mock
-        Block b = mock(Block.class);
-        when(b.getType()).thenReturn(Material.SAND);
-        Block ab = mock(Block.class);
-        when(ab.getType()).thenReturn(Material.WATER);
-        when(b.getRelative(any())).thenReturn(ab);
-        when(ab.getLocation()).thenReturn(location);
-        when(gh.contains(any())).thenReturn(false);
-        br.convertBlock(b);
-        verify(b, never()).setType(any());
-    }
-
     /**
      * Test method for {@link world.bentobox.greenhouses.greenhouse.BiomeRecipe#convertBlock(org.bukkit.block.Block)}.
      */
@@ -315,6 +296,26 @@ public class BiomeRecipeTest {
         verify(b, never()).setType(Material.CLAY);
     }
 
+    /**
+     * Test method for {@link world.bentobox.greenhouses.greenhouse.BiomeRecipe#convertBlock(org.bukkit.block.Block)}.
+     */
+    @Test
+    public void testConvertBlockNoLocalBlock() {
+        // Setup
+        Material oldMaterial = Material.SAND;
+        Material newMaterial = Material.CLAY;
+        double convChance = 100D;
+        br.addConvBlocks(oldMaterial, newMaterial, convChance, null);
+
+        // Mock
+        Block b = mock(Block.class);
+        when(b.getType()).thenReturn(Material.SAND);
+        br.convertBlock(b);
+
+        verify(b, never()).getRelative(any());
+        verify(b).setType(Material.CLAY);
+    }
+
     /**
      * Test method for {@link world.bentobox.greenhouses.greenhouse.BiomeRecipe#convertBlock(org.bukkit.block.Block)}.
      */