diff --git a/source/component/plant.py b/source/component/plant.py
index 79b9a7e..d5127a0 100755
--- a/source/component/plant.py
+++ b/source/component/plant.py
@@ -593,7 +593,7 @@ class PotatoMine(Plant):
         self.is_init = True
         self.init_timer = 0
         self.bomb_timer = 0
-        self.explode_x_range = c.GRID_X_SIZE / 2
+        self.explode_x_range = c.GRID_X_SIZE * 0.6
 
     def loadImages(self, name, scale):
         self.init_frames = []
@@ -621,8 +621,8 @@ class PotatoMine(Plant):
                 self.is_init = False
 
     def canAttack(self, zombie):
-        if (not self.is_init and zombie.rect.right >= self.rect.x and (not zombie.lostHead) and
-                (abs(zombie.rect.x - self.rect.x) <= self.explode_x_range)):
+        if (not self.is_init and (not zombie.lostHead) and
+                (abs(zombie.rect.x - self.rect.x) <= self.explode_x_range*(5/6))):
             return True
         return False