洋桔梗为目前日本最流行的夏季切花,早在1933年,日本就有洋桔梗商用种子栽培的历史。洋桔梗实生苗培育时间太长,户外生产的切花品质差,花期短,仅限于从夏季至早秋。种植者一般都采用自繁种子,整齐度不高,花色也仅限于紫色。因此,在80年代前的50多年里桔梗一直没有发展起来,品种流动只限于各家种子公司之间。 Eustoma is currently Japan’s most popular summer cut flowers, as early as 1933, Japan has eustoma custard commercial seed cultivation history. Eustoma fertile seedling cultivation time is too long, outdoor production of cut flowers of poor quality, short flowering period, limited to summer to early autumn. Growers generally use self-propagation of seeds, uniformity is not high, color is limited to purple. As a result, Campanulaceae did not develop for over 50 years before the 1980s, and the flow of species was limited to the various seed companies.