The invention relates to an out-of-season flowering cultivation method for ornamental peach blossoms, aims to produce ornamental sweet-glue flowers in northern areas, and belongs to the technical field of gardening cultivation. The method is characterized in that a naturally
overwintering potted
peach blossom variety is moved into a
greenhouse for artificial
dormancy breaking and flower
bud differentiation promotion. Peach saplings of varieties such as red pendent branches,
cinnabar pendent branches and red peaches which are 3-5 years old are selected and naturally
overwintering in an
open field, and fertilization is performed before leaves of autumn trees fall so as to improve nutrients of the trees. Transferring the peach seedlings into a
greenhouse according to the date of Spring Festival every year for breaking
dormancy and forcing flowers; the
growth time of the peach trees in the
greenhouse is 5-6 weeks so as to achieve the optimal ornamental period during the Spring Festival; the temperature supplied to the greenhouse is about 24 DEG C at night and about 35 DEG C at
daytime; meanwhile,
water supply is recovered. A large number of tests prove that the method can enable various peach tree varieties to bloom during the Spring Festival. Through the out-of-season cultivation mode, ornamental peach blossoms can be obtained in northern areas during the Spring Festival, the varieties of flowers at the sweet dumplings are enriched, and the flower market at the sweet dumplings is expanded.