Zinnia, also known as Zinnia, has huge flowers, rich colors, unique flower shapes, and a long flowering period. It is a common potted summer flower in gardens. First, the breeding method: commonly used sowing and cutting propagation. 1. Sowing propagation takes place in March and March. 120-130 seeds per gram of seeds, germination temperature 21-25 °C, after sowing, 7-10 days of germination, the germination rate was 60%. Seed till flowering due to variety, from 45-75 days. 2. Cutting propagation Cutting propagation is generally conducted from June to July. Use 1.0 cm of L. jasminoides to cut into the sand bed, root the roots for 15-20 days, and plant 25 days later. Because the cutting seedlings are not well-growth, the operation is troublesome, and the practical application is not universal; Second, the cultivation and management of seedlings when planting 4-6 leaves when planted in 10-12 cm pots. There are few lateral roots in the zinnia and attention is paid to the side roots when transplanting. When the height of the seedling is 10 cm, it is carried out to pick up the heart, which promotes multiple branching. In order to produce dwarfed plants, it was sprayed with 0.5% more than 2 weeks after topping, and the effect was remarkable. Can also use growth regulating substances to regulate the flowering period, seedling stage spraying with o.25% +0.4% than the long-term solution, can be early flowering, flowers close; if using 0.4-0.8% longer than or CCC, spray 2-4 times Will delay flowering. The seedling stage was fertilized once every half month, and two times of phosphorus and potassium fertilizers were applied before flower bud formation. Or use "Friends" 20-20-20 general fertilizer. After flowering, no need to remove streaks in time to promote the emergence of new lateral branches between the leaves and leaves, and then flowering. Seed plants must be isolated to prevent hybridization between varieties and affect seed quality.