What defines a robusta coffee?

Robusta coffee is defined by its higher caffeine content, which contributes to its distinct characteristics. The increased caffeine not only enhances the coffee's bitterness but also imparts a stronger, earthy flavor profile compared to arabica coffee. This earthy taste can sometimes be perceived as harsher, making it a popular choice for espresso blends and instant coffees where a bolder flavor is desired. The higher caffeine level is also associated with greater resistance to pests and diseases, making robusta coffee plants easier to cultivate in certain regions. Overall, the defining traits of robusta coffee serve to set it apart from other coffee varieties, particularly arabica, in terms of both flavor and cultivation advantages.