Phragmites karka seeds grow into the tropical reed — a tall, robust rhizomatous perennial grass native to the wet tropical biome across the Old World Tropics, from tropical Africa east through South Asia, South-East Asia to Australia and the Pacific. Described by Retzius and transferred by Trinius ex Steudel. The epithet karka is derived from a local name. Closely related to the common reed (P. australis) but adapted to tropical conditions. Produces culms to 3–5 m with large, broad leaves and large terminal panicles. Widely used for thatch, mat-making, paper production and constructed wetlands. Family Poaceae, subfamily Arundinoideae.Full sun; moist to wet soils or shallow water; warm wet tropical conditions. Invasive potential in wetlands — check local regulations. 'Karka' from local name; tropical counterpart of P. australis; culms to 3–5 m; Retzius/Trin. ex Steud. Thatch, mat-making, paper, constructed wetlands; dominant tropical wetland grass Old World Tropics (Tropical Africa to Australia and Pacific) — wet tropical biome Genus Phragmites ~4 species; Family Poaceae (Arundinoideae) Full sun; wet soils; warm tropical; check invasive status; Family Poaceae Phragmites karka is the tropical reed — the warm-climate counterpart of the common reed across the Old World Tropics from Africa to Australia, its tall culms a dominant feature of tropical wetlands and widely used for thatch and fibre across its range. IMPORTANT: Pictures show the adult plant, which is not for sale. The offer is only for seeds.