Fertilizer

 was a limited time currency during the Terwilligers 2015 Event. It was earned in different ways:
 * By tapping on Mutant Vegetables (Act One) and Bob Clones (Act Two and Three) that appeared on the streets of the Player's Springfield.
 * By tapping on Mutant Seeds that appeared on the player's town.
 * By completing Cecil's Daily Tasks
 * By completing event-related jobs at the Monsarno Research.

was used to Upgrade the Monsarno Research and to Craft prizes available at the same place.

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