Because he was a green thumb.
Why did the Jolly Rancher get a job as a crossing guard?
Because he was good at stopping traffic.
Why did the Jolly Rancher get a job as a firefighter?
Because he was always cool under pressure.
Why did the Jolly Rancher get a job as a lifeguard?
Because he was always saving the day.
Why did the Jolly Rancher get a job as a teacher?
Because he was always full of knowledge.