diff --git a/mods/bg_tree/grow.lua b/mods/bg_tree/grow.lua
index 62e47f5..ca37f74 100644
--- a/mods/bg_tree/grow.lua
+++ b/mods/bg_tree/grow.lua
@@ -71,7 +71,7 @@ minetest.register_abm({
 		if blockgame.chance(4) then
 			local root_source = api.find_bottom_log(pos, 8)
 			if root_source ~= nil then
-				spread_roots_from(root_source)
+				spread_roots_from(root_source + blockgame.vector.dirs.down)
 			end
 		end