Gold Magnet

Gold Magnet is the upgraded form of the Magnet-shroom. It costs $7500 to buy one from Crazy Dave. Every 20 Seconds it collects most, if not all, coins within a five tile radius, saving the player time (and from carpal tunnel!)

Usage
The Gold Magnet takes up a plant slot when beginning a round. It costs 50 sun to plant, and must be planted on an existing Magnet-shroom.

Note: The Magnet-shroom does not have to be awake, and the Gold Magnet is awake during both day and night.

Every 20 or so seconds, when there are coins or diamonds on the field, it charges, collecting all money in a fairly large radius.

Note: Gold Magnets lose their ferro-magnetism, meaning that they cannot collect any other metal objects other than money. They do not behave like Magnet-shrooms at all. Carefully decide if you can spare one to collect more money.

Strategy
Due to their automatic Cash collection tendencies, Gold Magnets are very popular to use with Marigolds, since the latter reliably generate money every 25 seconds. There exists Farming strategies that exploit many marigolds producing cash while the enemy fruitlessly hammers away at the impenetrable outer walls.