It’s a poinsettia. Poinsettia is a short-day flower, and flower buds need short days to differentiate, which in turn requires a long period of continuous darkness every day. If it is maintained indoors under the influence of fluorescent lights, the continuous darkness will be broken, resulting in poor flower bud differentiation. In addition, temperature also has a great influence on the differentiation of flower buds. 1. Poinsettia likes loose and well-drained soil. Generally, it uses 3 parts of vegetable garden soil, 3 parts of humus soil, 3 parts of humus leaf soil, 1 part of decomposed cake fertilizer, and a small amount of slag. Mix it up. Poinsettias love light and should receive adequate light all year round.

2. Temperature Poinsettia likes warmth and is afraid of cold. When entering the room in mid-to-late September every year, ventilation should be strengthened so that the plants can gradually adapt to the indoor environment. In winter, the room temperature should be maintained at 15°C to 20°C. At this time, the bracts are changing color and the flower buds are differentiating. Spraying Flower Stabilizer at the right time can make the flower buds strong, the petals enlarged, the flowers brightly colored, the flowers rich in fragrance, and the flowering period extended. If the room temperature is below 15°C, the flowers and leaves will not develop properly. It will enter the flowering stage after mid-December and gradually ventilate.

3. Water and fertilize. Poinsettia is not tolerant to drought or moisture, so watering should be flexibly controlled according to the weather, pot soil and plant growth conditions. Poinsettia likes to be fertile. In addition to adding organic fertilizer and water chestnut slices as base fertilizer when repotting and repotting, during the growth and flowering season, diluted fertilizer should be applied at a timely manner and a new high-fat film fertilizer should be sprayed to preserve moisture.

4. Plastic pruning, repot the dormant old plants before and after Qingming Festival, cut off old roots and diseased branches, and apply callus antiseptic film on the wounds after pruning to make the wounds heal quickly and promote their germination. New technology, pruning is required during the growth process, and large amounts of fertilizer and water should be controlled during cultivation, especially in autumn before the plants are established. When the branches are 20 to 30 centimeters long, start shaping and bending. The purpose is to make the plant short and small, with neat and even flower heads, so as to improve the ornamental value. Generally, a slightly lower temperature is needed. Above 25 degrees Celsius is not conducive to the differentiation of flower buds.

First check whether the lighting requirements of your poinsettia are met, and then check the temperature. If you want to bloom early, there is still time to deal with it. In addition to being completely dark at night, you should also put it in complete darkness for a few hours during the day so that the exposure time is less than 12 hours. In this way, red leaves will appear before the Spring Festival.