Viola tricolor being cultivated in Changsha district can′t come into decorative period on the eve of the Spring Festival. In order to solve this problem, the experiment that Viola tricolor is sprayed with 40,000 units of GA_3 with phosphate and potash fertilizer has been conducted. This study showed that the decorative period appears ahead of time , so the period of appreciation comes at the eve of the Spring Festival, the numbers of flower and flower buds increase remarkably, but flowers′ diameters have no change. The blooming period of the ...