Large Watering Can大きなじょうろ

Used to water seeds and soil. It holds more water than a regular watering can and covers an area of up to 2x2 tiles.
In-game description

What is Large Watering Can? Features and uses

Large Watering Can is a common item in Core Keeper (Tools). It is crafted at the Iron Workbench from Iron Bar ×10.

Large Watering Can key points (from the game data)

Sells to merchants for 63 Ancient Coins.

Calculated and summarized by this site from the game data (1.3.0.6).

Large Watering Can notes

It holds more water and covers a wider area than the normal Watering Can.
Use it to water planted seeds.
Crops only need watering once.
Use it on a water source to refill it.
A button switches the watering area between 1×1 and 2×2 tiles.
A full can normally waters 60 times.
Each watering uses 5 water, whatever area is selected.
Water-saving effects lower the amount used.
It can also put out the flames from Malugaz the Corrupted.

These notes cover behavior that the game files do not show directly. They are based on facts from the Core Keeper Wiki (Fandom) page "Large Watering Can" (CC BY-SA 3.0), rewritten in this site's own words.

How to craft Large Watering Can (materials)

Crafted at Iron Workbench What each crafting station makes →

Material	Amount	How to get the material
Iron Bar	× 10	Crafting Chest

Crafting time: 1 s

What you get from salvaging Large Watering Can (Salvage and Repair Station)

Large Watering Can can be salvaged. Salvaging it gives the following items.

For each material, the amount is "amount used to craft × 0.49 (lower when durability is down, 0.3 at 0 durability) × the item's multiplier", and a fraction is the chance of one more (2.4 means 2, with a 40% chance of 3). The range is from 0 durability to full durability (items without durability always count as full). Scrap parts are a fixed number set by the item level. All items that can be salvaged are listed in salvaging.

How to get Large Watering Can

Placed in or on the Wood Table found inside a scene (building, ruin, camp and so on) (guaranteed)Where: Nature Egg Hut [Azeos' Wilderness] (1 per world)
Placed in or on the Pedestal found inside a scene (building, ruin, camp and so on) (guaranteed)Where: Abandoned Desert Farm [The Desert of Beginnings] (1 per world)

Scene containers, dungeon placements, guaranteed drops and natural spawns are based on the Obtaining data of the Core Keeper Wiki (Fandom) (CC BY-SA 3.0), because these are not in the game files this site reads. Scene names are the wiki's English names.