--- a/net/minecraft/block/FlowerPotBlock.java
+++ b/net/minecraft/block/FlowerPotBlock.java
@@ -23,10 +23,37 @@
    protected static final VoxelShape field_196450_a = Block.func_208617_a(5.0D, 0.0D, 5.0D, 11.0D, 6.0D, 11.0D);
    private final Block field_196452_c;
 
+   private final Map<net.minecraft.util.ResourceLocation, java.util.function.Supplier<? extends Block>> fullPots;
+   private final java.util.function.Supplier<FlowerPotBlock> emptyPot;
+   private final java.util.function.Supplier<? extends Block> flowerDelegate;
+
+   @Deprecated // Mods should use the constructor below
    public FlowerPotBlock(Block p_i48395_1_, Block.Properties p_i48395_2_) {
+      this(Blocks.field_150457_bL == null ? null : () -> (FlowerPotBlock) Blocks.field_150457_bL.delegate.get(), () -> p_i48395_1_.delegate.get(), p_i48395_2_);
+      if (Blocks.field_150457_bL != null) {
+         ((FlowerPotBlock)Blocks.field_150457_bL).addPlant(p_i48395_1_.getRegistryName(), () -> this);
+      }
+   }
+
+   /**
+    * For mod use, eliminates the need to extend this class, and prevents modded
+    * flower pots from altering vanilla behavior.
+    *
+    * @param emptyPot    The empty pot for this pot, or null for self.
+    * @param p_i48395_1_ The flower block.
+    * @param properties
+    */
+   public FlowerPotBlock(@javax.annotation.Nullable java.util.function.Supplier<FlowerPotBlock> emptyPot, java.util.function.Supplier<? extends Block> p_i48395_1_, Block.Properties p_i48395_2_) {
       super(p_i48395_2_);
-      this.field_196452_c = p_i48395_1_;
-      field_196451_b.put(p_i48395_1_, this);
+      this.field_196452_c = null; // Unused, redirected by coremod
+      this.flowerDelegate = p_i48395_1_;
+      if (emptyPot == null) {
+         this.fullPots = Maps.newHashMap();
+         this.emptyPot = null;
+      } else {
+         this.fullPots = java.util.Collections.emptyMap();
+         this.emptyPot = emptyPot;
+      }
    }
 
    public VoxelShape func_220053_a(BlockState p_220053_1_, IBlockReader p_220053_2_, BlockPos p_220053_3_, ISelectionContext p_220053_4_) {
@@ -40,7 +67,7 @@
    public ActionResultType func_225533_a_(BlockState p_225533_1_, World p_225533_2_, BlockPos p_225533_3_, PlayerEntity p_225533_4_, Hand p_225533_5_, BlockRayTraceResult p_225533_6_) {
       ItemStack itemstack = p_225533_4_.func_184586_b(p_225533_5_);
       Item item = itemstack.func_77973_b();
-      Block block = item instanceof BlockItem ? field_196451_b.getOrDefault(((BlockItem)item).func_179223_d(), Blocks.field_150350_a) : Blocks.field_150350_a;
+      Block block = item instanceof BlockItem ? getEmptyPot().fullPots.getOrDefault(((BlockItem)item).func_179223_d().getRegistryName(), Blocks.field_150350_a.delegate).get() : Blocks.field_150350_a;
       boolean flag = block == Blocks.field_150350_a;
       boolean flag1 = this.field_196452_c == Blocks.field_150350_a;
       if (flag != flag1) {
@@ -58,7 +85,7 @@
                p_225533_4_.func_71019_a(itemstack1, false);
             }
 
-            p_225533_2_.func_180501_a(p_225533_3_, Blocks.field_150457_bL.func_176223_P(), 3);
+            p_225533_2_.func_180501_a(p_225533_3_, getEmptyPot().func_176223_P(), 3);
          }
 
          return ActionResultType.SUCCESS;
@@ -76,6 +103,17 @@
    }
 
    public Block func_220276_d() {
-      return this.field_196452_c;
+      return flowerDelegate.get();
    }
+
+   public FlowerPotBlock getEmptyPot() {
+      return emptyPot == null ? this : emptyPot.get();
+   }
+
+   public void addPlant(net.minecraft.util.ResourceLocation flower, java.util.function.Supplier<? extends Block> fullPot) {
+      if (getEmptyPot() != this) {
+          throw new IllegalArgumentException("Cannot add plant to non-empty pot: " + this);
+      }
+      fullPots.put(flower, fullPot);
+   }
 }