The invention provides a method for prolonging the ornamental period of autumn
colored-leaf garden trees and provides a composite
plant regulator capable of delaying leaf falling of autumn
colored-leaf trees in northern areas. The method for prolonging the ornamental period of the autumn leaf garden trees mainly aims at the problem that part of autumn leaf
tree species in northern areas are short in ornamental period after color change in autumn, specifically, the method can prolong the ornamental period of high-ornamental-value leaf
tree species such as
fraxinus amricana 'Autumn Purple',
acer truncatum and the like in autumn, and the ornamental period of the autumn leaf garden trees in autumn can be prolonged, so that the ornamental period of the autumn leaf garden trees in autumn can be prolonged, and the ornamental period of the autumn leaf garden trees in autumn can be prolonged. The
fertilizer can promote color change of autumn leaves of garden trees,
delay fallen leaves of the garden trees, prolong leaf hanging time of the autumn leaves, enhance low
temperature resistance of ornamental plants, improve comprehensive
stress resistance such as
disease resistance and
insect resistance of the ornamental plants and promote growth of the ornamental plants.