A bell pepper can be an herb or a small shrub.
The bell pepper plant ( Capsicum annuum)'s classification is somewhat flexible. It typically grows to a height of 0.3–1.2 meters (1–4 feet) and a width of 15–30 cm (6–12 inches). This size puts it in a gray area between being a purely herbaceous plant and a small shrub. The distinction depends partly on the specific variety and growing conditions. Its leaves are glossy, roughly oval, with smooth margins, and can reach up to 7.5 cm (3 inches) in length.
Therefore, while often referred to as an herb, the bell pepper plant's size and semi-woody characteristics allow it to also be considered a small shrub.
