Cultivation and Maintenance of Poinsettia

Poinsettia prefers a warm, sunny environment that is not tolerant to cold. The optimum temperature for growth is from 22Â°C to 27Â°C, and winter temperatures above 15Â°C can continue to grow. Poinsettias are mainly propagated by cuttings and are generally easy to survive from May to August. The cuttings used should be yellow-brown, smooth and robust shoots, 10 cm to 15 cm in length, with 3 to 4 leaf buds, the cuttings cut into bevels, the insertion depth is 1/2 of the cuttings, and the watering is inserted. Move to a cool, ventilated place and cover with plastic bags. For soil used for cultivation, nutrient soils with loose and high fertilizer efficiency should be used. Use 5 parts of natural humus soil, 3 parts of garden soil, 2 parts of bean cake, use 50% thiophanate-methyl 600- to 800-fold or 50% carbendazim wettable powder to disinfect. After 24 hours, wash spare. Poinsettia is very sensitive to water, afraid of dryness, and uneven watering, can cause adverse reactions, dry leaves are curled, and sorghum is soft and sagging. In the early stages of growth, the temperature is not high, watering is less, summer temperatures are high, leaves are large, and water consumption is high. In addition, water should be replenished according to the actual situation. Poinsettia hi fat, but the initial growth should be appropriate to control fertilizer and water, so as not to grow long, resulting in too long internodes, usually a good effect of fermented cake fat, close to flowering, to increase the application of phosphate fertilizer, so that larger and more brilliant leaves. Poinsettia is a light plant. It should be placed in a sunny place. The pots should not be too crowded to facilitate ventilation and avoid lengthy growth. After the basin is fixed in position, do not move it often, otherwise it will affect the growth. Poinsettia begins to differentiate flower buds in late October and can flower from about 60 days to 70 days. If you want to flower in advance, you can take a short daylight treatment and use a double-paper cover to block the light from 5pm to 8pm every day, and remove it after 8pm. After 40 days to 50 days, the buds will open. After the poinsettia flower has been given, all the branches should be recut immediately, leaving only the base two sections, so that the plants will enter a dormant state. After heavy cutting, the pot should be placed in a warm indoor place, stop watering and fertilizing, let it sleep, and only pour some water on the surface of the pot. When it is warm, move it to the outdoors for normal management.