Why are the new leaves of roses turning black? What should I do if the new buds of roses turn black?

Roses are very common in our daily life. Many people like to grow some roses because of their gorgeous flowers and their effects of promoting blood circulation, regulating menstruation, reducing swelling and detoxifying. So why do new leaves of roses turn black? What should we do if the new buds of roses turn black? Let's take a look.

Why are the new leaves of roses turning black?

1. Improper watering

When watering roses, you should follow the principle of not watering unless the soil is dry and watering thoroughly. Keep the soil moist and slightly dry at ordinary times. The pot soil should not be too wet. In rainy seasons, prevent water accumulation in the pot. It will cause the roots to lack oxygen and rot, and cause the new leaves of the plant to turn black and wither.

2. Improper fertilization

Although roses like fertilizer, the amount of fertilizer should not be too much. At ordinary times, it is necessary to pay attention to applying thin fertilizers frequently; too much fertilizer will burn the root system and affect the growth of the root system, causing the new leaves to turn black and wither.

3. Light and temperature

Roses like to grow in an environment with sufficient light and good ventilation. They should not be placed in a dark, humid and poorly ventilated environment for a long time. In the hot season, avoid direct sunlight to prevent burns on the leaves and tender leaves.

4. Soil

The soil for growing roses should be loose, humus-rich, and slightly acidic sandy soil with good drainage. Do not use soil with too much viscosity, which will cause the soil to compact, reduce soil permeability, and be detrimental to root growth, causing root corruption. Observe whether there are diseases and insect pests, and remove them in time.

What to do if the new buds of roses turn black

Melasma is more likely to occur in hot and humid weather. Prevention is the main thing in normal times, as it is difficult to cure after the disease occurs.

Prevention: Spray carbendazim, thiophanate-methyl, thiophanate-methyl and Bordeaux mixture alternately every ten days.

Treatment: Spray a mixture of myclobutanil and thiabendazole.

What should I do if the rose soil is moldy?

1. Clean up the dead branches and leaves on the surface of the rose soil, as well as weeds and other organic matter that is not fully decomposed

2. Control watering, place the moldy rose potted plants in a well-ventilated and sunny place to dry, use a sturdy stick to turn the soil around the pot, and let it dry for a while. If the mold is too severe, it is recommended to change the soil and transplant.