Mods in den Spieleordner reingeschoben. So richtig tief.

mods/farming/crops/rhubarb.lua

@@ -55,6 +55,7 @@ def.tiles = {"farming_rhubarb_3.png"}
 def.drop = {
 	items = {
 		{items = {"farming:rhubarb"}, rarity = 1},
+		{items = {"farming:rhubarb"}, rarity = 3}
 	}
 }
 minetest.register_node("farming:rhubarb_3", table.copy(def))
@@ -84,4 +85,21 @@ farming.registered_plants["farming:rhubarb"] = {
 }
 
 -- mapgen
-farming.register_decoration("rhubarb",3)
+
+minetest.register_decoration({
+	deco_type = "simple",
+	place_on = {
+		"default:dirt_with_grass", "mcl_core:dirt_with_grass", "ethereal:prairie_dirt"
+	},
+	sidelen = 16,
+	noise_params = {
+		offset = 0,
+		scale = farming.rhubarb,
+		spread = {x = 100, y = 100, z = 100},
+		seed = 798,
+		octaves = 3,
+		persist = 0.6
+	},
+	y_min = 3, y_max = 20,
+	decoration = "farming:rhubarb_3"
+})