diff --git a/src/main/java/cz/jzitnik/game/logic/services/grass/GrassGrowingLogic.java b/src/main/java/cz/jzitnik/game/logic/services/grass/GrassGrowingLogic.java
new file mode 100644
index 0000000..282e122
--- /dev/null
+++ b/src/main/java/cz/jzitnik/game/logic/services/grass/GrassGrowingLogic.java
@@ -0,0 +1,49 @@
+package cz.jzitnik.game.logic.services.grass;
+
+import cz.jzitnik.game.Game;
+import cz.jzitnik.game.annotations.CustomLogic;
+import cz.jzitnik.game.entities.Block;
+import cz.jzitnik.game.entities.items.ItemBlockSupplier;
+import cz.jzitnik.game.logic.CustomLogicInterface;
+
+import java.util.*;
+
+@CustomLogic
+public class GrassGrowingLogic implements CustomLogicInterface {
+    private static final int RADIUS = 35;
+    private final Random random = new Random();
+
+    @Override
+    public void nextIteration(Game game) {
+        int[] data = game.getPlayerCords();
+        var world = game.getWorld();
+        int playerX = data[0];
+        int playerY = data[1];
+
+        int startX = Math.max(0, playerX - RADIUS);
+        int startY = Math.max(0, playerY - RADIUS);
+        int endX = Math.min(world[0].length - 1, playerX + RADIUS);
+        int endY = Math.min(world.length - 1, playerY + RADIUS);
+
+        for (int x = startX; x <= endX; x++) {
+            for (int y = startY; y <= endY; y++) {
+                List<Block> blocks = world[y][x];
+                if (blocks.stream().anyMatch(block -> block.getBlockId().equals("dirt"))) {
+                    // Dirt
+                    if (world[y - 1][x].stream().allMatch(block -> block.isGhost() || block.isMob() || block.getBlockId().equals("air")) && random.nextInt(3) < 1) {
+                        world[y][x].removeIf(block -> block.getBlockId().equals("dirt"));
+                        world[y][x].add(ItemBlockSupplier.getBlock("grass"));
+                    }
+                } else if (blocks.stream().anyMatch(block -> block.getBlockId().equals("grass"))) {
+                    // Grass
+                    if (!world[y - 1][x].stream().allMatch(block -> block.isGhost() || block.isMob() || block.getBlockId().equals("air")) && random.nextInt(3) < 1) {
+                        world[y][x].removeIf(block -> block.getBlockId().equals("grass"));
+                        world[y][x].add(ItemBlockSupplier.getBlock("dirt"));
+                    }
+                }
+            }
+        }
+
+    }
+
+}
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