A bunch of red is a perennial herbaceous flower, plant is short and strong, the plant shape is beautiful, the inflorescence is bunched, the flower is bright red, the flowering period is very long, often cultivated for one year. 1. Seeding: Usually planted in open field seedbeds from late March to early May, or early sowing and early flowering in greenhouses from December to March. In order to promote its early emergence and increase the seedling rate, seeds can be soaked in warm water of about 30°C for 5-6 hours before sowing, and then they are kneaded in a gauze bag to wash the mucus on the seed surface and then sowing. After sowing, keep the bed moist and germinate and sprout after one week. After the young seedling leaves, it should be less watered to make the seedlings tall and straight to prevent lodging. 2. Cutting: Before and after the Ching Ming period, new shoots can be cut from a string of red mothers that are overwintering in greenhouses, or from the beginning of a string of red headings in June-August, using cutting tips for cuttings. The cutting length is generally maintained at 2-3 sections. Insert in a permeable, air-permeable substrate (eg, ash, perlite, etc.). After the plug, it should be filled with water, and pay attention to the shade and leaf spray to keep the air moist. Rooting usually begins after one week. Can also use simple spray full light cutting seedlings, not only easy to manage, but also can shorten the cutting time, and improve the survival rate. However, it caused some waste to tap water. Second, the cultivation and management: 1. Transplantation: When the seedlings grow to three pairs of leaves or survival of cuttings seedlings, transplanting can be carried out. The base fertilizer should be applied to the transplanting ground or potted soil, and the root water should be poured after planting. 2. Topping: Immediately after planting, pick up the heart and keep only 1 to 2 knots. Later, with the growth of the seedlings repeated topping, each picking up only on the basis of the original to leave 1-2 is appropriate. To promote plant dwarf, plump, flower dense. 3. Debridement: A string of red flowers many times during growth. Generally at the temperature of 20-25 °C and short-day conditions, new shoots can grow after 25 days of flowering. Therefore, after a string of red blossoms, we must cut off the residual flowers in time to reduce the consumption of nutrients and promote flowering again. At the same time, you can also use this feature to adjust the flowering period as needed. For example, to make the National Day colorful and neat, you can make a final pick-up on September 1-5. 4. Water and Fertilizer Management: During the growth period, in order to avoid a bunch of red pigtails, watering should be done less frequently, and weeding and weeding should be done 2-3 times a month. In particular, after each bud removal, it is necessary to pour enough water and apply fertilizer and water after one week. The logistic fertilizer is applied to the water and P and K fertilizers are added appropriately to promote new shoots and blossom. 5. If you want to cultivate a large plant-type string of red, you can cut some of the young shoots in late autumn, leave the old roots in the greenhouse, continue to carry out the management of turning pots, fertilizing, topping, etc., and you can cultivate a string of large plants in the coming summer. red. China Agricultural Network Editor