Temperature Limits for Seed Germination in Industrial Hemp (Cannabis sativa L.)

Industrial hemp (Cannabis sativa L.) as a grain and fiber crop is experiencing resurgence in North America. Due to governmental prohibition, there has been limited information on regional agronomic production systems including basic seed germination. This study was initiated provide the relationship between temperature germination seed. Germination measured at constant temperatures ranging from 3 42 °C. Cardinal were determined for two industrial oil cultivars (‘Georgina’ ‘Victoria’). The optimal indicated by high mean percentage rate 19 30 Optimal (29.6 °C), base (3.4 °C) ceiling (42.6 calculated linear regression of rates reach 50% each temperature. thermal time ‘Georgina’ ‘Victoria’ suboptimal 694 714 °C h, respectively. osmotic solid matrix-primed seeds germinated faster than untreated seeds, but final percentages not different. primed supraoptimal did impact thermally inhibited seeds.