Marigold

A Marigold is a money producing plant. It is also the first plant the player gets in the Zen Garden.

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Planting the Marigold costs 50 Sun. Every 24 seconds or so it produces either a silver ($10) or a gold ($50) coin. Gold coins are rarer than silver.
 * Note: These are best used in conjunction with Gold Magnets, as you'll probably be too busy tending your other plants to collect the money yourself.



Strategy
Marigolds are great space fillers in early levels due to the lack of higher level zombies and potential for hoarding excess Sun. In later levels Marigolds take up too many valuable slots to be worthwhile (especially on the Roof).

Marigolds are commonly used in the Mini-game Last Stand for Gold Farming.

Trivia

 * Marigold is the only plant that can be bought for the Zen Garden.
 * Though Marigolds planted in the game modes all have white petals, Zen Garden Marigolds come with many different petal colors. (Marigolds with white petals can still be found.)
 * During a level's final wave, both Marigolds and killed zombies stop producing coins. Even newly-planted Marigolds will only produce three coins or so before stopping.
 * Marigold sprouts can be seen growing in the loading bar on the title page before a Zombie head shoots out.
 * The Marigold is the only plant that has white petals.