Barth is a small cucumber who goes to the Veggie Valley Grade School in Bumblyburg. He goes to school along with Laura Carrot, Junior Asparagus, Lenny Carrot, Percy Pea, Renee Blueberry and Gourdy. He is also Larry the Cucumber's nephew. It is unknown who Barth is voiced by.
Barth is a small green cucumber. He wears a pair of moon glasses that are colored black and white. He also wears a blue vest and a white undershirt with a red bowtie. He is very similar to his uncle, Larry.
- Himself in "Larry-Boy and the Rumor Weed" (cameo)