Added new param soil_group to plant def

game_api.txt

@@ -381,7 +381,8 @@ The farming API allows you to easily register plants and hoes.
 		steps = 8,                             -- How many steps the plant has to grow, until it can be harvested
 		-- ^ Always provide a plant texture for each step, format: modname_plantname_i.png (i = stepnumber)
 		minlight = 13,                         -- Minimum light to grow
-		maxlight = default.LIGHT_MAX           -- Maximum light to grow
+		maxlight = default.LIGHT_MAX,          -- Maximum light to grow
+		soil_group = "soil"                    -- Soil node group where plant can grow ("soil" by default)
 	}
 
 

mods/farming/api.lua

@@ -130,7 +130,7 @@ local function tick_again(pos)
 end
 
 -- Seed placement
-farming.place_seed = function(itemstack, placer, pointed_thing, plantname)
+farming.place_seed = function(itemstack, placer, pointed_thing, plantname, soil_group)
 	local pt = pointed_thing
 	-- check if pointing at a node
 	if not pt then
@@ -173,7 +173,7 @@ farming.place_seed = function(itemstack, placer, pointed_thing, plantname)
 	end
 
 	-- check if pointing at soil
-	if minetest.get_item_group(under.name, "soil") < 2 then
+	if minetest.get_item_group(under.name, soil_group) < 2 then
 		return itemstack
 	end
 
@@ -279,6 +279,9 @@ farming.register_plant = function(name, def)
 	if not def.fertility then
 		def.fertility = {}
 	end
+	if not def.soil_group then
+		def.soil_group = "soil"
+	end
 
 	farming.registered_plants[pname] = def
 
@@ -322,7 +325,7 @@ farming.register_plant = function(name, def)
 					pointed_thing) or itemstack
 			end
 
-			return farming.place_seed(itemstack, placer, pointed_thing, mname .. ":seed_" .. pname)
+			return farming.place_seed(itemstack, placer, pointed_thing, mname .. ":seed_" .. pname, def.soil_group)
 		end,
 		next_plant = mname .. ":" .. pname .. "_1",
 		on_timer = farming.grow_plant,