The ability to farm different worm types is progressive. You must gain a specific amount of Farming XP to advance from one farm type to the next. You must start by farming Small worms, which requires no Farming XP to begin.From Smalls you advance to Tasty worms, and then to Enchanted's, and finally - to Magic worms. Please refer to the chart for specific worm type details
WORM TYPE XP NEEDED BASE AMOUNT BONUS WORMS CAP DAYS TO HARVEST
SMALLS NONE 100 NONE 100 7
TASTY 256 100 NONE 100 14
ENCHANTS 2048 30 2 PER 5 XP 100 16
MAGIC 8192 75 5/HARVEST 100 18
INGREDIENTS
SMALL WORM FARM
2 WATER
7 BIOWASTE
1 SMALL WORM BREEDING PAK
TASTY WORM FARM
8 WATER
15 BIOWASTE
1 TASTY WORM BREEDING PAK
ENCHANTED WORM FARM
16 WATER
45 BIOWASTE
1 ENCHANTED WORM BREEDING PAK
MAGIC WORM FARM
125 ENCHANTED WORMS
2000 GOLDS
150 WATER
250 BIOWASTE