Begonia Rex “Shadow King Red Lava”

Rex begonia, native to northeastern India and Southeast Asia through hybrid lineage, is a rhizomatous begonia known for its bold, patterned foliage in shades of silver, green, red, purple, and black. What makes this plant special is its dramatic leaf design—spirals, veining, and metallic tones layered together, making each variety look almost painted or textured.

Light should be bright but controlled to protect the leaf surface. Place it in an east-facing window or a softer south exposure where it gets consistent light without direct sun hitting the leaves. (2-3 feet back) Under grow lights, use 5000K–6500K placed 10–14 inches from the top of the plant. In lower light, the colors fade and the plant can stretch. Strong, even light keeps the patterns vibrant and the growth compact.

Watering should be controlled and focused around the rhizome. Allow the soil to partially dry out between waterings, then water thoroughly and let it drain, using a mix of succulent soil, perlite, and orchid bark to keep airflow high. Avoid keeping the rhizome constantly wet or watering directly over the crown. If leaves collapse at the base while the soil is wet, it points to rhizome rot. Crisping edges while leaves stay firm often indicate humidity drops, while dull color or smaller leaves point to light levels rather than watering.