Sedum polytrichoides introduction, domestication, cultivation and breeding method

The invention relates to a sedum polytrichoides introduction, domestication, cultivation and breeding method. The sedum polytrichoides introduction, domestication, cultivation and breeding method is characterized by comprising the following steps: (1) collecting wild plants, moisturizing, taking the wild plants back, then implementing pre-domestication and domestication, and carrying out the conventional cultivation; (2) cutting overground stem parts of the successfully domesticated plants into stem fragments, each of which contains at least one section, treating with potassium permanganate, spreading the stem fragments onto matrix formed by mixing peat containing 0.5-0.8kg/m slow release fertilizer, pine scales and perlite in a volume ratio of (18-20):(20-25):(6-10), spraying gibberellin, keeping the matrix wet all the time, and keeping air humidity to be more than 70% until plants with roots overspread the whole container, wherein carbendazim is sprayed for disinfection in a rooting period; and (3) after the plants overspread the whole container, transferring the plants to outdoor ground, carrying out seedling hardening for 1-2 weeks, and then outplanting. The sedum polytrichoides introduction, domestication, cultivation and breeding method is not restricted by seasons, production can be carried out at any time, the propagating quantity is high, a market gap can be rapidly filled, and demands of gardens and parks can be met.