diff --git a/df_caverns/growth_restrictions.lua b/df_caverns/growth_restrictions.lua
index 431ac47..8add75e 100644
--- a/df_caverns/growth_restrictions.lua
+++ b/df_caverns/growth_restrictions.lua
@@ -8,28 +8,31 @@ end
 
 if df_caverns.config.restrict_trees_to_biomes then
 
-	add_biome_restrictions(df_trees, "black_cap_growth_permitted", {blackcap = true})
-	add_biome_restrictions(df_trees, "blood_thorn_growth_permitted", {bloodthorn = true})
-	add_biome_restrictions(df_trees, "fungiwood_growth_permitted", {fungiwood = true, fungispore = true})
-	add_biome_restrictions(df_trees, "goblin_cap_growth_permitted", {goblincap = true, towergoblin = true})
-	add_biome_restrictions(df_trees, "nether_cap_growth_permitted", {nethercap = true})
-	add_biome_restrictions(df_trees, "spore_tree_growth_permitted", {sporetree = true, fungispore = true})
-	add_biome_restrictions(df_trees, "tower_cap_growth_permitted", {towercap = true, towergoblin = true})
-	add_biome_restrictions(df_trees, "tunnel_tube_growth_permitted", {tunneltube = true})
-	
+	if minetest.get_modpath("df_trees") then
+		add_biome_restrictions(df_trees, "black_cap_growth_permitted", {blackcap = true})
+		add_biome_restrictions(df_trees, "blood_thorn_growth_permitted", {bloodthorn = true})
+		add_biome_restrictions(df_trees, "fungiwood_growth_permitted", {fungiwood = true, fungispore = true})
+		add_biome_restrictions(df_trees, "goblin_cap_growth_permitted", {goblincap = true, towergoblin = true})
+		add_biome_restrictions(df_trees, "nether_cap_growth_permitted", {nethercap = true})
+		add_biome_restrictions(df_trees, "spore_tree_growth_permitted", {sporetree = true, fungispore = true})
+		add_biome_restrictions(df_trees, "tower_cap_growth_permitted", {towercap = true, towergoblin = true})
+		add_biome_restrictions(df_trees, "tunnel_tube_growth_permitted", {tunneltube = true})
+	end
+
 	-- Deliberately not biome-restricted
 	--add_biome_restrictions(df_trees, "torchspine_growth_permitted", {})
 	--add_biome_restrictions(df_trees, "spindlestem_growth_permitted", {})
-	
-	add_biome_restrictions(df_primordial_items, "primordial_mushroom_growth_permitted", {["primordial fungus"] = true})
-	add_biome_restrictions(df_primordial_items, "giant_mycelium_growth_permitted", {["primordial fungus"] = true})
-	add_biome_restrictions(df_primordial_items, "giant_fern_growth_permitted", {["primordial jungle"] = true})
-	add_biome_restrictions(df_primordial_items, "jungle_mushroom_growth_permitted", {["primordial jungle"] = true})
-	add_biome_restrictions(df_primordial_items, "jungletree_growth_permitted", {["primordial jungle"] = true})
+	if minetest.get_modpath("df_primordial_items") then
+		add_biome_restrictions(df_primordial_items, "primordial_mushroom_growth_permitted", {["primordial fungus"] = true})
+		add_biome_restrictions(df_primordial_items, "giant_mycelium_growth_permitted", {["primordial fungus"] = true})
+		add_biome_restrictions(df_primordial_items, "giant_fern_growth_permitted", {["primordial jungle"] = true})
+		add_biome_restrictions(df_primordial_items, "jungle_mushroom_growth_permitted", {["primordial jungle"] = true})
+		add_biome_restrictions(df_primordial_items, "jungletree_growth_permitted", {["primordial jungle"] = true})
+	end
 
 end
 
-if df_caverns.config.restrict_farmables_to_biomes then
+if df_caverns.config.restrict_farmables_to_biomes and minetest.get_modpath("df_farming") then
 	add_biome_restrictions(df_farming.growth_permitted, "df_farming:cave_wheat_seed",
 		{fungiwood = true, tunneltube = true, sporetree = true, fungispore = true})
 	add_biome_restrictions(df_farming.growth_permitted, "df_farming:dimple_cup_seed",