Potted Poinsettia soil cleaning is the first thing, there should be no peculiar smell. Secondly, it has better drainage, a small amount of soluble salt, and necessary elements to meet the growth of poinsettia. If you dig directly from the garden in the community, you should ensure that there are no impurities. Generally, the selected soil is mainly peat soil, mixed with perlite, vermiculite, ceramsite and sawdust. Before planting, the soil shall be spread out and exposed to the sun for 30 minutes.
Poinsettia is fond of fertilizer. It can be fertilized once in 7-10 growth period, and can be applied with NPK compound fertilizer. From August to flowering, the application of liquid nitrogen and phosphorus fertilizer once in 7-10 days can ensure the flowers are large and bright. But each time fertilization should not be too much, let alone raw fertilizer. Usually fertilize in the evening, water in the morning the next day, and reduce the frequency and concentration of fertilization by half when the light is low in winter.
Poinsettia is sensitive to water, uneven watering, dry or wet will cause adverse reactions. Too much water, leaves droop or even rotten roots; insufficient water, leaves will curl. Therefore, if you water poinsettia, you should see that it is wet when it is dry. At the early stage of growth (the seedlings planted), the plants are not big and need less water. In summer, the temperature is high, the plants grow vigorously and need more water. Water once a day in the morning and evening, and spray water to the ground according to the weather conditions. In spring and autumn, water once or twice a day.
Poinsettia is a short sunshine plant. The flower bud differentiation starts within 12 hours every day. In order to bloom normally, the flower bud differentiation requires more than 15 hours of dark time. During this period (October to march of the next year), the light exposure should be prevented. In addition, normal maintenance and proper shade at noon in summer can be achieved.
The key to cultivating poinsettia is watering. As long as the weather is not bad suddenly, the outdoor environment can fully meet the growth needs of poinsettia. However, improper watering will affect the growth and development of plants and ensure that the basin soil is wet but not dry.
Poinsettia is a light loving flower. It can grow healthily under strong light. However, it can't stand the hot summer noon sun. Proper shading will not hinder its growth.
