The invention relates to a production method of a potted dendriform China rose which blossoms out in the New Year night comprises following steps: a. cultivating a dendriform China rose which is used for flower forcing in the Spring Festival; b. moving the dendriform China rose into a
greenhouse, which comprises the steps of
pruning the cultivated dendriform China rose once at the time of 80 to 85 days before coming into the market in the Spring Festival, implementing the root
pruning of the dendriform China rose at the same time when putting the dendriform China rose into a pot or moving the dendriform China rose into another pot, and moving the dendriform China rose into the
greenhouse; furthermore, the
greenhouse temperature does not raise and normal watering is implemented according to the
humidity level of pot soil in the period; c. heating in the greenhouse, which comprises: (1) starting heating in the greenhouse at the time of 65 to 70 days before coming into the market in the Spring Festival, keeping the temperature at 23 - 25 DEG C in the day time and 15 - 18 DEG C in the
evening, and implementing the fine
pruning of the dendriform China rose once when the heating is started; furthermore, all fruits, flowers, buds and over-bourgeon sprouts are
cut in the fine pruning, and the length of all sprouts that are kept is less than 5 millimeters; (2) managing
irrigation-fertilization and
plant protection in the heating period; (3) splashing the liquid
medicine with 1500 times of 20 percent of triazolone pr the liquid
medicine with 1000 to 1200 times of 70 percent of Mildothane or the liquid
medicine with 800 to 1000 times of 75 percent of
chlorothalonil wettable powder once every 7 to 10 days. The invention can lead the dendriform China rose to blossom out in the Spring Festival, which breaks the routine.