diff --git a/mods/bg_terrain/grass_grow.lua b/mods/bg_terrain/grass_grow.lua
index 5db7901..56c865d 100644
--- a/mods/bg_terrain/grass_grow.lua
+++ b/mods/bg_terrain/grass_grow.lua
@@ -24,7 +24,7 @@ end
 blockgame.register_abm({
 	nodenames = {"bg_terrain:grass"},
 	neighbors = {"bg_terrain:dirt"},
-	interval = 15,
+	interval = 30,
 	chance = 8,
 	action = function (pos, node)
 		local sides = listify_table(blockgame.vector.sides)