在洛阳,牡丹花期为谷雨前后,花期集中且短。由于牡丹每年只有一次生长,为了延长花期,笔者于1989年进行试验,使牡丹的每年一次生长变为二次生长,即用人工来促生二次枝(秋枝)。所试牡丹90年的花期比同品种牡丹的自然花期天数推迟一倍,花色、花径不逊于自然花期的花朵。有效地延长了牡丹的观赏期。做法是:首先,选择牡丹的早、中开品种,如 In Luoyang, peony flowering valley before and after the valley, flowering concentrated and short. As the peony only grows once a year, in order to extend the flowering period, the author conducted a trial in 1989 to change the annual growth of the peony into the secondary growth, that is, the secondary branch (Qiuzhi) was manually induced to grow. Peony 90 years of the trial than the same species of peony natural flowering days doubled, color, flower diameter no less than the natural flowering of flowers. Effectively extend the ornamental period of the peony. The approach is: First of all, choose the early peony, in the open species, such as