Flower propagation is a means to propagate flower offspring and preserve germplasm resources. Germplasm resources can only be used for production and landscaping if they are preserved and propagated to a certain amount, which provides conditions for flower seed selection and breeding. Different species or varieties of flowers have different propagation methods and periods. Applying the correct propagation methods to different kinds of flowers in time can not only improve the propagation coefficient, but also make the seedlings grow healthily. There are many methods of flower propagation, which can be roughly divided into the following categories.

(1) Sexual reproduction, also known as seed reproduction, means that flowers and plants turn to reproductive stage in the later vegetative growth stage, and flower buds differentiate, develop and bloom, eventually forming seeds. The process of reproducing with seeds is called sexual reproduction.

(2) Asexual propagation, also known as vegetative propagation, is a propagation method of obtaining new plants by using some vegetative bodies (roots, stems, leaves and buds) of flowers and plants. It usually includes meristem, cutting, grafting, layering and other methods.

(3) Spore reproduction spores are directly produced by fern sporophytes without sexual union, which is essentially different from the formation of seeds. In addition to ramet propagation, ferns can adopt spore propagation method.

(4) Tissue culture is a method to cultivate new plants by inoculating some cells, tissues or organs of plants to a certain culture medium under aseptic conditions. Tissue culture is also called micropropagation.