Mine Fruit was a plant in Plants vs. Zombies Online. It was first announced in the East Sea Dragon Palace update. It could be seen on the loading screen and the main menu. It was unavailable in the main game, but could've been obtained in Adventure Mode. Players also could exchange "magic plant currency" for Mine Fruit in magic exchange.
Plant Food effect
When given Plant Food, Mine Fruit would attack an enemy unit with the least health. If the target's current health percentage was less than 50%, the damage would be critical.