1990年9月25日,河南省洛阳市牡丹研究所一项题为“牡丹露地超早促成新技术研究”的科研项目,通过了专家的评审鉴定。此项成果,打破了千百年来人们认为的牡丹秋季催花必须经过“低温春化”的常规,使雍容华贵的洛阳牡丹秋季在露地自然条件下开放。牡丹自然花期在4月中下旬,仅10余天。为使其 September 25, 1990, Luoyang City, Henan Province, Peony Institute, a project entitled “peony open a pioneering new technology research” scientific research projects, passed the appraisal of experts. This achievement broke the perennial call for flowers peonies have been through the “low temperature vernalization” routine, so that the graceful Luoyang Peony in autumn in open natural conditions. Peony natural flowering in late April, only 10 days. To make it