Marigold

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

Usage
Planting the Marigold costs 50 Sun. Every 24 Seconds [Speculation, testing needed] it produces either a silver [$10] or gold [$50] coin. Gold coins are rarer than silver.

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 Chapter 5].