Regeneration of native species is the first priority for biodiversity conservation and restoration. To this end it is key to have seeds properly conserved in seed banks and knowledge of seed longevity and/or dormancy alleviation at different storage time intervals. In addition, understanding germination response of the stored seeds to environmental conditions improves the efficiency of restoration and rehabilitation projects. We investigated the influence of storage duration (1 to 5 years), light (0, 12 hours light), thermoperiod (night/day temperatures of 15/20 and 20/25°C), and salinity (0, 100, 200 and 400 mM of NaCl) on seed germination of Rhanterium epapposum, a glycophytic species from the Arabian Peninsula. Seeds maintained viability after five years of storage indoors at room temperature. Three years of storage alleviated seed dormancy. Exposure to 12 hours light per day and 15/20°C thermoperiods enhanced seed germination. Seeds were glycophytic; afteripened seeds exposed to salinity exhibited reduced germination that did not recover after salinity alleviation.