Brown spots on Bird of Paradise plants are commonly caused by fungal pathogens. Anthracnose, caused by Colletotrichum gloeosporioides, manifests as sunken, brown lesions on leaves and stems. Cercospora leaf spot, caused by Cercospora spp., leads to reddish-brown to brown spots on the foliage. Mycosphaerella leaf spot, caused by Mycosphaerella musicola, causes dark-brown to black spots with yellow margins. Septoria leaf spot, caused by Septoria strelitziae, displays small, brown to dark brown spots with gray centers. Rust, caused by Uromyces strelitziae, results in raised, orange to brown pustules on the plant’s surfaces. These pathogens can significantly affect the plant’s appearance and health, requiring proper identification and management to maintain optimal growth.