【Objective】The aim of this research was to observe Rosa chinensis flowering habit and quality in summer,investigate the effects of gibberellin on appearance quality of Rosa chinensis. 【Method】Elite cultivars were screened following by field observation of bud period, petal-display period, initial flowering period, full flowering period, flowering lastperiod, plant growth vigor and appearance quality of 22 Rosa chinensis varieties in summer from June to August, 2010.Different gibberellin concentrations of 10...