change few growing to nil and lettuce/cabbage drops

crops/blackberry.lua

@@ -42,7 +42,7 @@ minetest.register_node("farming:blackberry_3", table.copy(def))
 
 -- stage 4
 def.tiles = {"farming_blackberry_4.png"}
-def.groups.growing = 0
+def.groups.growing = nil
 def.drop = {
 	items = {
 		{items = {'farming:blackberry 2'}, rarity = 1},

crops/cabbage.lua

@@ -53,8 +53,8 @@ def.tiles = {"farming_cabbage_6.png"}
 def.groups.growing = nil
 def.drop = {
 	max_items = 2, items = {
-		{items = {"farming:cabbage"}, rarity = 1},
-		{items = {"farming:cabbage"}, rarity = 2}
+		{items = {"farming:cabbage 2"}, rarity = 1},
+		{items = {"farming:cabbage 1"}, rarity = 2}
 	}
 }
 minetest.register_node("farming:cabbage_6", table.copy(def))

crops/lettuce.lua

@@ -44,11 +44,11 @@ minetest.register_node("farming:lettuce_4", table.copy(def))
 
 -- stage 5
 def.tiles = {"farming_lettuce_5.png"}
-def.groups.growing = 0
+def.groups.growing = nil
 def.drop = {
 	items = {
 		{items = {'farming:lettuce 2'}, rarity = 1},
-		{items = {'farming:lettuce 2'}, rarity = 2},
+		{items = {'farming:lettuce 1'}, rarity = 2},
 	}
 }
 minetest.register_node("farming:lettuce_5", table.copy(def))

crops/pepper.lua

@@ -133,7 +133,7 @@ minetest.register_node("farming:pepper_6", table.copy(def))
 
 -- stage 7 (red pepper)
 def.tiles = {"crops_pepper_plant_7.png"}
-def.groups.growing = 0
+def.groups.growing = nil
 def.drop = {
 	max_items = 2, items = {
 		{items = {'farming:pepper_red 2'}, rarity = 1},