diff --git a/abms.lua b/abms.lua
index 1b82f77..51d88e5 100644
--- a/abms.lua
+++ b/abms.lua
@@ -279,9 +279,8 @@ minetest.register_abm({
 })
 
 local no_tree_grow = {'fun_caves:bark', 'fun_caves:leaves'}
-local wood_nodes = {{name = 'fun_caves:diamondwood'}, {name = 'fun_caves:ironwood'}, {name = 'fun_caves:tree'}}
+local wood_nodes = {{name = 'fun_caves:diamondwood'}, {name = 'fun_caves:ironwood'}, {name = 'fun_caves:sap'}, {name = 'fun_caves:tree'}}
 minetest.register_abm({
-	nodenames = { "fun_caves:tree", 'fun_caves:ironwood', 'fun_caves:diamondwood' },
 	neighbors = {'air'},
 	interval = 5 * fun_caves.time_factor,
 	chance = 900,
@@ -301,8 +300,10 @@ minetest.register_abm({
 			minetest.set_node(new_pos, wood_nodes[1])
 		elseif math.random(25) == 1 then
 			minetest.set_node(new_pos, wood_nodes[2])
-		else
+		elseif math.random(25) == 1 then
 			minetest.set_node(new_pos, wood_nodes[3])
+		else
+			minetest.set_node(new_pos, wood_nodes[4])
 		end
 	end
 })