Mods in den Spieleordner reingeschoben. So richtig tief.

mods/farming/crops/pumpkin.lua

@@ -107,4 +107,23 @@ farming.registered_plants["farming:pumpkin"] = {
 }
 
 -- mapgen
-farming.register_decoration("pumpkin",8)
+
+minetest.register_decoration({
+	deco_type = "simple",
+	place_on = {
+		"default:dirt_with_grass", "default:dirt_with_rainforest_litter",
+		"mcl_core:dirt_with_grass"
+	},
+	sidelen = 16,
+	noise_params = {
+		offset = 0,
+		scale = farming.pumpkin,
+		spread = {x = 100, y = 100, z = 100},
+		seed = 576,
+		octaves = 3,
+		persist = 0.6
+	},
+	y_min = 1, y_max = 3,
+	decoration = "farming:pumpkin_8",
+	spawn_by = {"group:water", "group:sand"}, num_spawn_by = 1
+})