Elephant grass is a new type of landscaping plant, which can create a light and elegant aesthetic feeling and has a good ornamental effect, so it is widely used. The leaves, stems and inflorescences of elephant grass are all purplish red, the width of leaves is about 2mm, and the height is1.5m. It starts heading and flowering in late June, and the ear is 30cm long. The flower viewing period can last until the end of 10. Not cold-tolerant, can not survive below 4℃. Wine red leaves are the main ornamental shapes and are often cultivated as annual plants, which are suitable for flower beds, flower borders, cluster planting, row planting, patch planting or potted plants.

▲ Pennisetum purpurea

Propagation cultivation

20 17 introduced seedlings from Beijing Hua Mu company, and introduced seedlings in the middle and late March every year. After the introduction of seedlings, seedlings should be tempered in the shed to adapt to the temperature and humidity in the shed. Harden the seedlings for 5-7 days.

The nutrient soil cultivation container is 190 bicolor basin. Nutritive soil is made of peat soil, perlite, pine needle soil and garden soil in the ratio of 5_ 1_ 1_3, and slow-release fertilizer is added.

Cultivation cultivation 190 two-color pots are filled with soil, and 2cm nozzles are left for watering. After filling the soil, water it, take out the plug seedlings with tweezers and plant them in the center of the basin. After planting, water the roots. After 3 days of planting, 50% density sunshade net should be covered. After 3 days, remove the sunshade net.

The ramet propagation can be carried out in late April, and plants that overwinter safely in the greenhouse should not be watered the day before the ramet propagation. Remove the pot soil, prune the root system, keep the root system and protective soil about 5cm, and prune the upper plants 1/3 to reduce transpiration. When dividing plants, the integrity of the plant cluster should be kept as much as possible. If the separated tillers are cultivated together, the survival rate of dividing plants will be reduced. Take 10 ~ 15 tillers. The flowerpot is half filled with soil. Put the divided plants into a flowerpot, cover the other half with soil, pour water through it, cover the sunshade net, and take off the sunshade net after the plants survive.

Cutting propagation in summer, selecting stem segments with full axillary buds and more nutrient accumulation for cutting. The proportion of peat soil and perlite is 3_ 1, and 72-hole tray is selected. The cuttings at the base and middle stem segments of the mother plant have low rooting rate at the top and weak seedlings. Cutting 10cm, watering cutting, cutting depth 2cm, keeping temperature at 20℃ ~ 25℃ and humidity at 75% ~ 85%. When the temperature is high during the day, keep the air circulating, spray water on the cuttings to avoid drying, control the temperature of the substrate, and avoid being too wet and rotting. Spraying bactericide 1 time after cutting for 5 days. Complete plants can be formed in 10 ~ 15 days and transplanted into pots.

Water and fertilizer management and pest control

Watering at seedling stage should follow the principle of seeing dry and seeing wet, and it should be watered thoroughly every time, so as not to make the substrate too dry and cause withering. Elephant grass is a full-day plant, its leaves turn green when the light is not good, and it will return to burgundy after 3 ~ 5 days of strong sunshine. Urea can be applied at the early stage of fertilization to increase growth. Apply water-soluble fertilizer in the later stage to ensure that the plants are strong and straight. The temperature is controlled at 20℃ ~ 35℃. When the pot is full, drain it in time, and the spacing between plants is 35cm, so that the plants will grow plump. When heading, locusts and cabbage caterpillar mainly harm the flower heads and leaves, and they should be controlled with 10% deltamethrin 1000 ~ 1500 times solution.