1、 Lack of light

The growth of sunflower is inseparable from light. If there is no sun for a long time during the maintenance period, it will affect the growth in a cool environment, thus affecting the flowering and leading to non flowering. If it is caused by lack of light, we should move to a place with good lighting as soon as possible and get more sun. It is best to give full day light. In the environment of sufficient light, it can accumulate more nutrients, so that it can grow vigorously and bloom as scheduled

2、 Lack of nutrients

The failure of sunflower to bloom may also be caused by the lack of nutrients. There are many nutrients consumed in the peak growth season and flowering period. It is best to apply topdressing every half a month, and apply potassium dihydrogen phosphate leaf fertilizer every month before flowering, so as to promote smooth flowering and vigorous growth

3、 Improper watering

Although sunflower has certain drought resistance, if it is not watered for a long time during the maintenance period, it will hinder its growth and affect its flowering. If the basin soil is found to be dry, replenish water in time. It is not resistant to waterlogging. Watering too much is not conducive to growth, and even retting roots. Watering is best carried out according to the method of seeing dry and seeing wet. Do not dry or water. The watering amount shall be well controlled, and it shall be poured thoroughly every time, and there shall be no ponding

4、 Improper trimming

Sunflower has strong germination performance, so it should be trimmed in time during maintenance. If not pruned for a long time, it will consume a lot of nutrients, which will lead to the non flowering of sunflowers. It is better to cut off the bare branches, thin and weak branches, pest branches and dry branches in time to reduce nutrient consumption, promote more concentrated nutrients and better internal ventilation and light transmittance, so as to promote lush branches and leaves and more flowers