diff --git a/app/ecs-components/water.js b/app/ecs-components/water.js
new file mode 100644
index 0000000..d289048
--- /dev/null
+++ b/app/ecs-components/water.js
@@ -0,0 +1,10 @@
+import Component from '@/ecs/component.js';
+
+export default class Water extends Component {
+  static properties = {
+    water: {
+      type: 'map',
+      value: {type: 'uint8'},
+    },
+  };
+}
diff --git a/app/ecs-systems/water.js b/app/ecs-systems/water.js
new file mode 100644
index 0000000..20ba83e
--- /dev/null
+++ b/app/ecs-systems/water.js
@@ -0,0 +1,13 @@
+import {System} from '@/ecs/index.js';
+
+export default class Water extends System {
+
+  tick(elapsed) {
+    const {Water} = this.ecs.get(1);
+    for (const tile in Water.water) {
+      Water.water[tile] = Math.max(0, Water.water[tile] - elapsed);
+    }
+    Water.water = {...Water.water};
+  }
+
+}
diff --git a/app/engine.js b/app/engine.js
index debe448..980af9e 100644
--- a/app/engine.js
+++ b/app/engine.js
@@ -128,6 +128,7 @@ export default class Engine {
           }
         ],
       },
+      Water: {water: {}},
     });
     const defaultSystems = [
       'ResetForces',
@@ -142,6 +143,7 @@ export default class Engine {
       'SpriteDirection',
       'RunAnimations',
       'RunTickingPromises',
+      'Water',
     ];
     defaultSystems.forEach((defaultSystem) => {
       const System = ecs.system(defaultSystem);
@@ -162,9 +164,13 @@ export default class Engine {
       Forces: {},
       Inventory: {
         slots: {
-          1: {
-            qty: 10,
-            source: '/assets/potion/potion.json',
+          // 1: {
+          //   qty: 10,
+          //   source: '/assets/potion/potion.json',
+          // },
+          2: {
+            qty: 1,
+            source: '/assets/watering-can/watering-can.json',
           },
           3: {
             qty: 1,
diff --git a/app/react-components/ecs.jsx b/app/react-components/ecs.jsx
index 789d5e8..24a28df 100644
--- a/app/react-components/ecs.jsx
+++ b/app/react-components/ecs.jsx
@@ -9,6 +9,7 @@ import Entities from './entities.jsx';
 import TargetingGhost from './targeting-ghost.jsx';
 import TargetingGrid from './targeting-grid.jsx';
 import TileLayer from './tile-layer.jsx';
+import Water from './water.jsx';
 
 export default function EcsComponent() {
   const [ecs] = useEcs();
@@ -40,7 +41,7 @@ export default function EcsComponent() {
   const {Direction, Position, Wielder} = entity;
   const projected = Wielder.activeItem()?.project(Position.tile, Direction.direction)
   const {Camera} = entity;
-  const {TileLayers: {layers: [layer]}} = ecs.get(1);
+  const {TileLayers: {layers: [layer]}, Water: {water}} = ecs.get(1);
   const [cx, cy] = [
     Math.round(Camera.x - RESOLUTION.x / 2),
     Math.round(Camera.y - RESOLUTION.y / 2),
@@ -51,6 +52,7 @@ export default function EcsComponent() {
       y={-cy}
     >
       <TileLayer tileLayer={layer} />
+      <Water tileLayer={layer} water={water} />
       {projected && (
         <TargetingGrid
           tileLayer={layer}
diff --git a/app/react-components/water.jsx b/app/react-components/water.jsx
new file mode 100644
index 0000000..4fdc8fa
--- /dev/null
+++ b/app/react-components/water.jsx
@@ -0,0 +1,51 @@
+import {Graphics} from '@pixi/react';
+import {forwardRef, useCallback, useEffect, useRef, useState} from 'react';
+
+const WaterTile = forwardRef(function WaterTile({height, width}, ref) {
+  const draw = useCallback((g) => {
+    g.clear();
+    g.beginFill(0x000000);
+    g.drawRect(
+      0,
+      0,
+      width,
+      height
+    );
+  }, [height, width]);
+  return <Graphics alpha={0} draw={draw} ref={ref} />
+});
+
+export default function Water({tileLayer, water}) {
+  const [mounted, setMounted] = useState(false);
+  useEffect(() => {
+    setMounted(true);
+  }, []);
+  const waterTile = useRef();
+  const waterTiles = [];
+  if (mounted) {
+    for (const tileIndex in water) {
+      const tileIndexNumber = parseInt(tileIndex);
+      const tx = tileIndexNumber % tileLayer.area.x;
+      const ty = (tileIndexNumber - tx) / tileLayer.area.x;
+      waterTiles.push(
+        <Graphics
+          x={tx * tileLayer.tileSize.x}
+          y={ty * tileLayer.tileSize.y}
+          alpha={Math.floor(water[tileIndex]) / (256 * 2)}
+          key={tileIndex}
+          geometry={waterTile.current}
+        />
+      );
+    }
+  }
+  return (
+    <>
+      <WaterTile
+        height={tileLayer.tileSize.y}
+        ref={waterTile}
+        width={tileLayer.tileSize.x}
+      />
+      {waterTiles}
+    </>
+  );
+}
diff --git a/public/assets/tomato-plant/may-grow.js b/public/assets/tomato-plant/may-grow.js
index 3295946..33bdcee 100644
--- a/public/assets/tomato-plant/may-grow.js
+++ b/public/assets/tomato-plant/may-grow.js
@@ -1 +1,20 @@
-return 3 !== plant.stage
+if (3 === plant.stage) {
+  return false
+}
+
+const {TileLayers, Water} = ecs.get(1);
+const layer = TileLayers.layer(0)
+const {Position} = ecs.get(plant.entity);
+const x = (Position.x - layer.tileSize.x * 0.5) / layer.tileSize.x
+const y = (Position.y - layer.tileSize.y * 0.5) / layer.tileSize.y
+const tileIndex = layer.area.x * y + x
+if (!Water.water[tileIndex]) {
+  return false
+}
+if (Water.water[tileIndex] < 32) {
+  return false
+}
+if (Water.water[tileIndex] > 224) {
+  return false
+}
+return true
diff --git a/public/assets/watering-can/icon.png b/public/assets/watering-can/icon.png
new file mode 100644
index 0000000..879b705
Binary files /dev/null and b/public/assets/watering-can/icon.png differ
diff --git a/public/assets/watering-can/projection-check.js b/public/assets/watering-can/projection-check.js
new file mode 100644
index 0000000..69da2b4
--- /dev/null
+++ b/public/assets/watering-can/projection-check.js
@@ -0,0 +1,10 @@
+const filtered = []
+
+for (let i = 0; i < projected.length; ++i) {
+  const tile = layer.tile(projected[i])
+  if ([7].includes(tile)) {
+    filtered.push(projected[i])
+  }
+}
+
+return filtered
diff --git a/public/assets/watering-can/start.js b/public/assets/watering-can/start.js
new file mode 100644
index 0000000..e285eb0
--- /dev/null
+++ b/public/assets/watering-can/start.js
@@ -0,0 +1,120 @@
+const {Direction, Position, Wielder} = wielder
+const projected = Wielder.activeItem()?.project(Position.tile, Direction.direction)
+if (projected?.length > 0) {
+
+  const {Controlled, Emitter, Sound, Sprite} = wielder
+  const {TileLayers, Water} = ecs.get(1)
+  const layer = TileLayers.layer(0)
+
+  Controlled.locked = 1
+  const [, direction] = Sprite.animation.split(':')
+  Sprite.animation = ['idle', direction].join(':');
+
+  const waterParticles = {
+    behaviors: [
+      {
+        type: 'moveAcceleration',
+        config: {
+          accel: {
+            x: 0,
+            y: 1500,
+          },
+          minStart: 0,
+          maxStart: 0,
+          rotate: false,
+        }
+      },
+      {
+        type: 'moveSpeed',
+        config: {
+          speed: {
+            list: [
+              {
+                time: 0,
+                value: 30
+              },
+              {
+                time: 1,
+                value: 0
+              }
+            ]
+          }
+        }
+      },
+      {
+        type: 'scale',
+        config: {
+          scale: {
+            list: [
+              {
+                value: 0.25,
+                time: 0,
+              },
+              {
+                value: 0.125,
+                time: 1,
+              },
+            ]
+          }
+        }
+      },
+      {
+        type: 'textureSingle',
+        config: {
+          texture: 'tileset/38',
+        }
+      },
+    ],
+    lifetime: {
+      min: 0.25,
+      max: 0.25,
+    },
+    frequency: 0.01,
+    emitterLifetime: 0.25,
+    pos: {
+      x: 0,
+      y: 0
+    },
+    rotation: 0,
+  };
+
+  Sound.play('/assets/watering-can/water.wav');
+  for (let i = 0; i < 2; ++i) {
+    for (let i = 0; i < projected.length; ++i) {
+      Emitter.emit({
+        ...waterParticles,
+        behaviors: [
+          ...waterParticles.behaviors,
+          {
+            type: 'spawnShape',
+            config: {
+              type: 'rect',
+              data: {
+                x: projected[i].x * layer.tileSize.x,
+                y: projected[i].y * layer.tileSize.y - (layer.tileSize.y * 0.5),
+                w: layer.tileSize.x,
+                h: layer.tileSize.y,
+              }
+            }
+          }
+        ]
+      })
+    }
+    await wait(0.25);
+  }
+
+  for (let i = 0; i < projected.length; ++i) {
+    const tileIndex = layer.area.x * projected[i].y + projected[i].x
+    let w;
+    if (Water.water[tileIndex]) {
+      w = Water.water[tileIndex]
+    }
+    else {
+      w = 0
+    }
+    Water.water[tileIndex] = Math.min(255, 64 + w);
+  }
+
+  Controlled.locked = 0;
+
+}
diff --git a/public/assets/watering-can/water.wav b/public/assets/watering-can/water.wav
new file mode 100644
index 0000000..a774d4c
Binary files /dev/null and b/public/assets/watering-can/water.wav differ
diff --git a/public/assets/watering-can/watering-can.json b/public/assets/watering-can/watering-can.json
new file mode 100644
index 0000000..b6c13ea
--- /dev/null
+++ b/public/assets/watering-can/watering-can.json
@@ -0,0 +1,11 @@
+{
+  "icon": "/assets/watering-can/icon.png",
+  "projectionCheck": "/assets/watering-can/projection-check.js",
+  "projection": {
+    "distance": [1, 0],
+    "grid": [
+      [1]
+    ]
+  },
+  "start": "/assets/watering-can/start.js"
+}