Andropogon gayanus Kunth is a tall grass, perennial, which growths naturally in Tropical África. Recently, new cultivars were selected in various countries. This paper is a literature review and a summary of research done in Colômbia on the production of seed of this species. The Andropogon gayanus reproduces sexually and is cross pollinated. At flowering in reacts to photoperiod as a short day plant, but is influenced by low temperatures. At latitudes around 15oS, it starts flowering in mid April and matures at end of May. The management of stablished areas for seed production at these latitudes must include grazing or precutting around mid February to obtain a better sincronyzed flowering and a restricted maximum plant height, which are critical for mechanical harvesting. In small areas, hand harvesting is most efficient in terms of seed yield and consists of the cutting, piling and threshing phases. Harvesting from the ground and mechanical harvest are possible, if properly handied. Two classes of seed can be found in the market: crude and processed. Common phases in processing are: precleaning and drying while deawning and air-screem cleaning are necessary to obtain processed seed. Characteristics of both classes are described, but classified seed have intemational purity of 35-40%, which is approximately two to three times the crude seed purity. Productivity of pure seed is around 35-340kg/ha. With appropriate crop husbandry (high plant density, fertilization, precutting and hand harvesting), it is possible to obtain productivity of 100kg/ha of pure seed. In three places in Colômbia a multiplication rate of 10 to 50ha/year was found and the average of 25 may be estimated for the future years in well managed areas. Pure seed present viability around 50% and germination of approximately 30% five months after harvest. If a good demand of seed exists, commercial production is possibile. The relative demand between crude and processed seed, will define the relative uselfulness of each class, seeding methods, distribution, storage and quality.