diff --git a/mods/ITEMS/mcl_crimson/init.lua b/mods/ITEMS/mcl_crimson/init.lua
index 6f2e48a05f..b225ab142f 100644
--- a/mods/ITEMS/mcl_crimson/init.lua
+++ b/mods/ITEMS/mcl_crimson/init.lua
@@ -549,33 +549,3 @@ mcl_dye.register_on_bone_meal_apply(function(pt,user)
 		spread_nether_plants(pt.under,node)
 	end
 end)
-
-minetest.register_abm({
-	label = "mcl_crimson:crimson_fungus",
-	nodenames = {"mcl_crimson:crimson_fungus"},
-	interval = 11,
-	chance = 128,
-	action = function(pos)
-		local nodepos = minetest.get_node(vector.offset(pos, 0, -1, 0))
-		if nodepos.name == "mcl_crimson:crimson_nylium" or nodepos.name == "mcl_nether:netherrack" then
-			if pos.y < -28400 then
-				generate_crimson_tree(pos)
-			end
-		end
-	end
-})
-
-minetest.register_abm({
-	label = "mcl_crimson:warped_fungus",
-	nodenames = {"mcl_crimson:warped_fungus"},
-	interval = 11,
-	chance = 128,
-	action = function(pos)
-		local nodepos = minetest.get_node(vector.offset(pos, 0, -1, 0))
-		if nodepos.name == "mcl_crimson:warped_nylium" or nodepos.name == "mcl_nether:netherrack" then
-			if pos.y < -28400 then
-				generate_warped_tree(pos)
-			end
-		end
-	end
-})
diff --git a/mods/MAPGEN/mcl_biomes/init.lua b/mods/MAPGEN/mcl_biomes/init.lua
index 38003535a7..2d2378833e 100644
--- a/mods/MAPGEN/mcl_biomes/init.lua
+++ b/mods/MAPGEN/mcl_biomes/init.lua
@@ -4831,7 +4831,7 @@ local function register_dimension_decorations()
 		fill_ratio = 0.02,
 		biomes = {"CrimsonForest"},
 		y_min = mcl_vars.mg_lava_nether_max + 1,
-		y_max = mcl_vars.mg_lava_nether_max  - 10,
+		y_max = mcl_vars.mg_nether_max  - 10,
 		flags = "all_floors",
 		decoration = "mcl_crimson:crimson_fungus",
 	})
@@ -4884,6 +4884,7 @@ local function register_dimension_decorations()
 		fill_ratio = 0.063,
 		biomes = {"CrimsonForest"},
 		y_min = mcl_vars.mg_lava_nether_max + 1,
+		y_max = mcl_vars.mg_nether_max -5,
 		flags = "all_ceilings",
 		height = 2,
 		height_max = 8,