1、 Potted plants

For potted plants, rotten leaves, coarse sand and garden soil should be used as culture soil, and burned grass ash and animal manure can also be added. The basin bottom should be drained with coarse sand, and the flower pot should be relatively deep and placed in a cool area

2、 Growth period

Twenty days after planting, fertilizer should be added two or three times, and topdressing should be done once every half a month during the growth period. Synthetic fertilizer or rotten liquid fertilizer should be used, and fertilizer containing fluorine or alkaline fertilizer should not be used, otherwise leaves will be burned. If you lack iron, you can spray ferrous sulfate. After fertilization, loosen the soil, which is more conducive to the absorption of fertilizer. It has a greater demand for nitrogen and potassium. It still needs to control phosphate fertilizer, because too much phosphate fertilizer will make its leaves wither and yellow. You can add some phosphate fertilizer when it blooms

3、 Before and after flowering

At this stage, potassium dihydrogen phosphate should be sprayed once every half a month. After the flowers are cut off, one or two times of phosphorus potassium quick acting fertilizer should be used. Rice washing water can be used to irrigate the roots, or urea and special flower fertilizer can be used twice a month. During the period from budding to flowering, magnesium nitrate is added twice a month. There is no need to add fertilizer during flowering. After flowering, liquid fertilizer can be added twice a month, which can make the leaves greener and help the stems grow stronger

4、 Severe winter season

When the winter is 5-8 degrees, you can apply fertilizer once a month. Once it is lower than 5 degrees, you should stop applying fertilizer and wait until the temperature rises. From the end of February to the beginning of March, add eight to ten grams of bone meal at the edge of the basin