The requirement of Catharanthus roseus on soil is not very high, but in the acid soil, the alkaline soil will lead to the poor growth of Catharanthus roseus, resulting in the yellow leaves and non flowering.
Solution: to test the pH value of the planted soil, if the soil is slightly alkaline, it should be treated.
The poor permeability of soil is also the reason for the yellow leaves of Catharanthus roseus. Many people plant flowers with high viscosity and poor permeability of soil. This kind of soil can not find any problems in a short time, but for a long time, the soil with poor permeability and air permeability causes the root of Changchun flower to breathe poorly, resulting in frequent yellow leaves and fallen leaves.
Solution: choose the sandy soil with good drainage performance to plant, and pay attention not to water too much.
Changchun flower should avoid dampness and waterlogging, and the basin soil should not be watered too much, otherwise it will affect the root respiration and cause the old leaves to turn yellow and the new leaves to turn yellow.
Solution: strictly control the watering, dry as the best, pay attention to drainage in rainy season.
Many flower friends worry that the nutrients of Changchun flower are not enough and the flowers are not good. They will occasionally get a little fertilizer or something and put it in the pot soil, hoping to absorb more flowers. This way is correct, but the wrong way is the frequency of fertilization. If they often apply fertilizer, Changchun flower is difficult to fully absorb. The fertilizer remains in the soil, always around the root, resulting in the whole plant's malaise and slow growth. Slow, less flowering, smaller petals.
Solution: Changchun flower can take a method of alternate application of compound fertilizer and liquid fertilizer. Do not apply fertilizer casually at other times. Water the next day after fertilization to promote nutrient absorption.
Changchun flower can't be watered too much, too little, too little or not fully for a long time, plants can't absorb enough water, new leaves will wilt, and old leaves will turn yellow and fall off.
Solution: pay attention to watering. The basin soil can be watered after it has dried completely. Watering should be done thoroughly.
