Big Leaves was a notable Welsh-language rock band that emerged from the vibrant Welsh music scene in the late 1990s and early 2000s. They initially performed under the name "Coleg", gaining recognition within their native Wales before transitioning to the name Big Leaves in line with their growing profile. The band’s style combined melody-driven rock with an unmistakable Welsh sensibility, and they played a significant role in the resurgence of Welsh-language music during their active years.

With the release of albums and singles like "Siglo," "Big Leaves," "Pwy Sy'N Galw," and "Belinda," the group solidified their presence in the Welsh music industry, earning both critical and fan acclaim. Their music was characterized by rich, poetic lyrics delivered in Welsh, layered over compelling guitar work and intricate rhythms. Even as their tunes resonated with contemporary sounds, they often drew on cultural elements that gave their work a rooted, unmistakable Welsh identity. Though not as widely known outside of Wales, Big Leaves' contribution to the promotion and preservation of the Welsh language through music has left a lasting legacy.