diff --git a/ferns/fern.lua b/ferns/fern.lua
index c0680f3..748479e 100644
--- a/ferns/fern.lua
+++ b/ferns/fern.lua
@@ -22,7 +22,6 @@ abstract_ferns.grow_fern = function(pos)
 	
 	if minetest.get_node(right_here).name == "air"
 			or minetest.get_node(right_here).name == "default:junglegrass" then
-	
 		if fern_size == 1 then
 			minetest.set_node(right_here, {name="ferns:fern_01", param2=fdir})
 		elseif fern_size < 4 then
diff --git a/ferns/treefern.lua b/ferns/treefern.lua
index 74ccd72..cb6cf39 100644
--- a/ferns/treefern.lua
+++ b/ferns/treefern.lua
@@ -10,64 +10,42 @@
 assert(abstract_ferns.config.enable_treefern == true)
 
 abstract_ferns.grow_tree_fern = function(pos)
-	local size = math.random(1,5)
-	local crown = math.random(1,2)
+
 	local pos_01 = {x = pos.x, y = pos.y + 1, z = pos.z}
+	if minetest.get_node(pos_01).name ~= "air"
+			and minetest.get_node(pos_01).name ~= "ferns:sapling_tree_fern"
+			and minetest.get_node(pos_01).name ~= "default:junglegrass" then
+		return
+	end
+
 	local pos_02 = {x = pos.x, y = pos.y + 2, z = pos.z}
 	local pos_03 = {x = pos.x, y = pos.y + 3, z = pos.z}
 	local pos_04 = {x = pos.x, y = pos.y + 4, z = pos.z}
 	local pos_05 = {x = pos.x, y = pos.y + 5, z = pos.z}
-	
-	if minetest.get_node(pos_01).name == "air"  -- instead of check_air = true,
-	or minetest.get_node(pos_01).name == "ferns:sapling_tree_fern"
-	or minetest.get_node(pos_01).name == "default:junglegrass" then
-	
-		if minetest.get_node(pos_02).name ~= "air"
-		or size == 1 then
-			minetest.set_node(pos_01, {name="ferns:tree_fern_leaves"})
-			
-		elseif minetest.get_node(pos_03).name ~= "air" 
-		or size == 2 then
-			minetest.set_node(pos_01, {name="ferns:fern_trunk"})
-			if crown == 1 then
-				minetest.set_node(pos_02, {name="ferns:tree_fern_leaves"})
-			else
-				minetest.set_node(pos_02, {name="ferns:tree_fern_leaves_02"})
-			end
-			
-		elseif minetest.get_node(pos_04).name ~= "air"
-		or size == 3 then
-			minetest.set_node(pos_01, {name="ferns:fern_trunk"})
-			minetest.set_node(pos_02, {name="ferns:fern_trunk"})
-			if crown == 1 then
-				minetest.set_node(pos_03, {name="ferns:tree_fern_leaves"})
-			else
-				minetest.set_node(pos_03, {name="ferns:tree_fern_leaves_02"})
-			end
-			
-		elseif minetest.get_node(pos_05).name ~= "air"
-		or size == 4 then
-			minetest.set_node(pos_01, {name="ferns:fern_trunk"})
-			minetest.set_node(pos_02, {name="ferns:fern_trunk"})
-			minetest.set_node(pos_03, {name="ferns:fern_trunk"})
-			if crown == 1 then
-				minetest.set_node(pos_04, {name="ferns:tree_fern_leaves"})
-			else
-				minetest.set_node(pos_04, {name="ferns:tree_fern_leaves_02"})
-			end
 		
-		elseif size == 5 then
-			minetest.set_node(pos_01, {name="ferns:fern_trunk"})
-			minetest.set_node(pos_02, {name="ferns:fern_trunk"})
-			minetest.set_node(pos_03, {name="ferns:fern_trunk"})
-			minetest.set_node(pos_04, {name="ferns:fern_trunk"})
-			if crown == 1 then
-				minetest.set_node(pos_05, {name="ferns:tree_fern_leaves"})
-			else
-				minetest.set_node(pos_05, {name="ferns:tree_fern_leaves_02"})
-			end
-			
-		end
+	local size = math.random(1, 5)	
+	local crown = ({ "ferns:tree_fern_leaves", "ferns:tree_fern_leaves_02" })[math.random(1, 2)]
+	
+	if minetest.get_node(pos_02).name ~= "air" or size == 1 then	-- TODO: Is ~= "air" intended behaviour?
+		minetest.set_node(pos_01, {name="ferns:tree_fern_leaves"})
+	elseif minetest.get_node(pos_03).name ~= "air" or size == 2 then
+		minetest.set_node(pos_01, {name="ferns:fern_trunk"})
+		minetest.set_node(pos_02, {name=crown})
+	elseif minetest.get_node(pos_04).name ~= "air" or size == 3 then
+		minetest.set_node(pos_01, {name="ferns:fern_trunk"})
+		minetest.set_node(pos_02, {name="ferns:fern_trunk"})
+		minetest.set_node(pos_03, {name=crown})
+	elseif minetest.get_node(pos_05).name ~= "air" or size == 4 then
+		minetest.set_node(pos_01, {name="ferns:fern_trunk"})
+		minetest.set_node(pos_02, {name="ferns:fern_trunk"})
+		minetest.set_node(pos_03, {name="ferns:fern_trunk"})
+		minetest.set_node(pos_04, {name=crown})
+	elseif size == 5 then
+		minetest.set_node(pos_01, {name="ferns:fern_trunk"})
+		minetest.set_node(pos_02, {name="ferns:fern_trunk"})
+		minetest.set_node(pos_03, {name="ferns:fern_trunk"})
+		minetest.set_node(pos_04, {name="ferns:fern_trunk"})
+		minetest.set_node(pos_05, {name=crown})
 	end
 end