Solanum sisymbriifolium is an important rootstock for tomato grafting cultivation in
Guangxi．This paper carried out seed pretreatment and germination test，and probed into the method of
breaking seed dormancy，and screening out the optimal combination of germination treatment for Solanum
sisymbriifolium seed．The results showed that low temperature and GA₃ treatment could relieve seed
dormancy．Low temperature induction for 60 days was the best treatment．200 mg·L^-1 GA₃ concentration under
varying temperature as 30 ℃ for 16 h/20 ℃ for 8 h；and 600 mg·L^-1 GA₃ concentration under 30 ℃ constant
temperature were more favorable for germination of Solanum sisymbriifolium seed．Seeds harvested by natural
fermentation are easier to germinate than that harvested directly without fermentation．