Seeds of Brachiaria humidicola were dried on an experimental scale in a gyrating drier under sun or shade, on asphalt floor under sun or shade, on concrete floor under sun or shade, and in a oven at 35°C. A fraction of these samples was stored undried as a check. At monthly intervals, for twelve months, the stored seeds were evaluated in relation to water content, puríty, germination and vigor (accelerated aging). The results indicated that, after one year of storage, the seeds dried in the shade, on asphalt or on concret floor presented germination of 60 and 62%, and vigor of 63 and 61%, respectively, while those dried in the gyrating drier, in sun or shade, and those of the control presented germination of 56, 55 and 52%, and vigor of 53, 56 and 52%, respectively. The germination and vigor of B. humidicola seeds, were infuenced by drier?s process which the seeds were submitted. The major decrease of germination and vigor took place on sun drying processes which ones the seeds got in direct contact with high temperature from floor (asphalt and concrete), and had been the drying above the water equilibrium point. The most germination and vigor leveIs were reached by gyrating drier with no difference among of expositions types (under sun or shade). The seeds conditioned in the driers exhibited the best visual aspect as to purity and coloration, while those of the control showed moulding caused by Aspergillus spp.