Placeable sprinklers — three tiers of sprinkler (Basic, Quality, Deluxe) are available from the farm shop; equip one and use it on tilled ground to place it.
Daily auto-watering — a placed sprinkler waters every covered tilled tile at the start of each day, including while you are offline, so covered crops always grow at full speed.
Placement preview — holding a sprinkler shows a translucent ghost at the tile you are facing; green means it can be placed here, red means a crop or object is already there.
Coverage patterns — Basic sprinklers water the four adjacent tiles; higher tiers cover a larger area around them.
Pickaxe pickup — equip the pickaxe and use it on a placed sprinkler to pick it back up; the item is always refunded before anything is removed, so a full bag means a safe reject, not a lost sprinkler.