49        if($this->age < self::MAX_AGE && $item instanceof 
Fertilizer){
 
   51            $tempAge = $block->age + mt_rand(2, 5);
 
   52            if($tempAge > self::MAX_AGE){
 
   53                $tempAge = self::MAX_AGE;
 
   55            $block->age = $tempAge;
 
   56            if(BlockEventHelper::grow($this, $block, $player)){