In winter, the temperature is very low, which is not good for the growth of sunflower, and it will freeze its roots. Therefore, it should be moved to a warm place indoors, and the temperature should be kept above 6 ℃. Generally in the southern region aquaculture, after the frost will be placed indoors, until the next year Qingming in out.
The water demand of sunflower itself is not big, and the low temperature dormancy period needs less water. Watering is often carried out in sunny days. Sufficient light can make the water evaporate, which will not cause the basin soil to be too wet. It's not good for its growth if it can't be watered in cloudy days.
Because sunflower can't bear low temperature, its leaf and stem are easy to be frostbitten. In order to reduce the possibility of freezing, it is necessary to cut off some leafstalks. Pruning range to be large, do not worry about its growth, the next year after the spring will continue to grow back.
Many plants cannot be fertilized in winter, and sunflower is no exception. Although it likes fertilizer very much, it is in dormancy period in winter and can hardly absorb nutrients. And the accumulation of fertilizer, will be in the next spring when the root development, to its damage.