Below are green leaves, and above the red leaves are plants with small yellow flowers. How to train them?

But poinsettia poinsettia is a kind of flower with short sunshine. Flower bud differentiation needs short sunshine, and short sunshine means long-term continuous darkness every day. If indoor maintenance is affected by fluorescent lamps, the continuous darkness will be broken, resulting in poor flower bud differentiation. In addition, temperature has a great influence on flower bud differentiation. Poinsettia likes loose soil with good drainage. Generally, 3 parts of garden soil, 3 parts of humus soil, 3 parts of humus soil, and decomposed cake fertilizer 1 part are used together with a small amount of slag. Poinsettia loves light, and it should get enough light all year round.

2, the temperature poinsettia likes warmth, afraid of cold. When entering the room in the middle and late September every year, it is necessary to strengthen ventilation to make plants gradually adapt to the indoor environment, and the room temperature should be kept at 15℃ to 20℃ in winter. At this time, the bracts change color and the flower buds differentiate. Spraying Hua Zhuang Di Ling at the right time can make the flower buds strong, the petals plump, the colors bright, the flowers fragrant and the flowering period prolonged. If the room temperature is lower than 15℃, flowers and leaves will be stunted. In mid-June, it will be in full bloom after 5438+February, and it should be ventilated gradually.

3, watering and fertilizing, poinsettia is not drought-resistant, not resistant to water and humidity, so watering should be flexible according to the weather, pot soil and plant growth. Poinsettia likes to give birth. In addition to adding organic fertilizer and horseshoe slices as base fertilizer when changing pots, dilute chemical fertilizer and spraying new high-fat film should be applied in time during the growing and flowering season to protect fertilizer and moisture.

4. Shaping and pruning: Before and after Tomb-Sweeping Day, the dormant old plants were changed into pots, the old roots and weak branches were cut off, and after pruning, a layer of callus antiseptic film was attached to the wound to make it heal quickly and promote its germination. Pay attention to the heart during the growth process, and control the big fertilizer and water during the cultivation, especially before the plant is finalized in autumn. When the branches grow to 20 to 30 centimeters, they will be shaped and bent. The purpose is to make the plants short, the flower heads neat and evenly distributed, and improve the ornamental value. Generally, it needs a little lower temperature, and above 25 degrees Celsius is not conducive to its flower bud differentiation.

First look at whether the lighting requirements of your poinsettia are met, and then look at the temperature. If you want to blossom early, it's not too late to deal with it now. In addition to being completely dark at night, it should also be placed in a completely dark place for several hours during the day, so that the illumination time is less than 12 hour, so that red leaves can appear before the Spring Festival.