The purpose of this study was to verify the influence of the osmoconditioning on the storage
potential of Cedrela fissilis (MELIACEAE) seeds under normal environmental conditions. The initial seed
quality and the responses on the osmoconditioning eficiency were also evaluated. Seeds of C. fissilis were
submited to accelerated aging for zero, 24 and 48 hours and 41oC, composing three sublots. Then, seeds
were imbibed for 16, 24 and 48 hours in solutions of polyethylene glycol (PEG 6000) at concentrations that
resulted in -0,4 and -0,8MPa potentials, at 30oC, dried for 25 days at room temperature and stored for eight
months. Germination tests were carried out before and after drying, and after two and eight months of
storage. Results showed that osmoconditioning in -0,4MPa for 16 and 48 hours improved the storage potential
of C. fissilis seeds. The effect of osmoconditioning was more efficient in the intermediate vigour sublot (24
hours of accelerated aging).