Longevity, Germination, and Emergence
of Wild Hemp (Cannabis Sativa L)
B.S. Kansas State University , 1970 Master Thesis
Storage Temperatures
After 15 months , wild hemp seed viability was relatively unaffected by storage temperatures. However, storage temperature had a great influence on germination, and germination generally increased with time. Seeds kept in cold storage had consistently low germination, while the germination of seeds stored at room temperature and natural temperatures was highly variable. :confused: :eek:
Seeds kept in cold storage would normally be expected to have high germination as seed dormancy would have been broken. Apparently, cold storage have to be exposed to higher temperatures for a period of time before they will germinate well. This was illustrated by seeds stored under diurnal temperature, where germination was low during winter but increased substantially when the soil temperature increased in the spring. In most stands during the year virtually no seeds germinated even when moister is available. Apparently, wild hemp seeds have an endogenous rhythm like that known to exist for seeds of other plant species. Salisbury & Ross (33) found germination of certain seeds appeared to be at certain times during the growing year, even though the seeds had been stored under constant temperature, light, and moisture.
Other studies have shown wild hemp seeds to be light and temperature sensitive ; reduced light and low temperatures enhanced seed germination. These mechinisms may have evolved to prevent all seeds from germinating at once and risk a stand falire due to natural occurrences such as late frost.
Wild hemp seed had a seasonal germination pattern. Maximum germination was in april. Germination was very low in july and october.
https://krex.k-state.edu/dspace/bitstream/handle/2097/10626/LD2668T41972T85.pdf?sequence=1