The line comes from Plants vs Zombies, the tower-defense game developed by PopCap Games and first released in 2009, where players defend a lawn from zombies by planting seed packets. At the start of each level, an announcer runs through the countdown before the first wave arrives, turning the familiar race-start formula into a gardening joke. Gameplay videos, remixes and short-form edits kept the phrase alive long after release, because it is short, instantly recognisable and easy to reuse as a start signal for almost any playful challenge.