In pot culture, we investigated the effects of decomposing litter of camphor [Cinnamomum camphora (L). Presl] on the growth of companion plants [Balsamine (Impatiens balsamina L) and Morning glory (Ipomoea nil L)] focusing on flowering traits, harvested seed quality, seed germination and seedlings growth in soil incorporated with/without the leaf litter. The camphor leaf litter dose of 0.56 % (mass fraction) significantly inhibited the vegetative growth indices (plant height, root collar, biomass and leaf development) of both receiver plants. Both recipient plant species showed delayed first-flower day, lower flowering velocity and decreased flower numbers after exposure to the leaf litter. Morning glory bloomed with smaller flowers at the higher (11^th ~15^th ) nodes. Despite these negative effects, the 1000-grain weight and germination of the seeds produced by the two recipient plants and growth performance of their offspring were slightly impacted. The balsamine was more sensitive than morning glory. By GC-MS, we detected 3-terpenoid compounds (Camphor, 1,8-Cineole and β-Caryophyllene), these caused allelopathic effects during camphor leaf litter decomposition.