Irrigation is 
Garrek's idea.
How to Unlock[]
Irrigation (Idea) can be unlocked by talking to Garrek after reaching the unlock requirements:
Smelting Tools Station built & 
Spindle Whorl and 
Well researched.
Completion Requirements[]
Irrigation (Idea) can be completed after reaching prosperity 145,000 
and having delivered 
Copper (10) and 
Tin (10) and 
Any Yarn (2) and 
Any Mushroom (1).
Rewards[]
Completing the idea rewards the Player with 
Irrigation Pump (1)
Irrigation Extender (1)
Irrigation Trench (6).
Gallery[]
TBA
See Also[]
| Ideas |
|---|
 Animal Friendship •  Animal Riding •  Animal Taming •  Art Station •  Beekeeping •  Breeding Pen •  Brewer •  Calendar •  Cask •  Cheese Cloth •  Clay Oven •  Cold Storage •  Composting •  Fermenter •  Granary •  Hammering •  A New Way of Fishing • Irrigation •  Mortar and Pestle •  Obsidian Working •  Gathered Garden •  Vinegar Pickling •  Plant Nursery •  Press •  School • Smelting • Spindle Whorl •  Sundial •  Trading •  Water Wheel • Well
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