The reason for the yellowing of Calendula leaves

Calendula leaves yellowing phenomenon, people often think that the disease is causing trouble, in fact, this is only one of the reasons, watering, fertilization, improper lighting will cause yellow leaves. So what is the reason why the leaves of calendula turn yellow? Let's take a look at the reasons for the yellowing of marigold leaves.

[big flowers and small pots]

Some varieties of marigold have larger flower shape, more roots, more water and fertilizer, and small pots can not meet their growth needs. At this time, the old leaves will be dry and yellow, and the tender leaves will be thin. It takes decades to change pots and add 30% rotten soil to the soil to ensure the normal growth of flowers.

[lack of water]

Watering reduced, will cause the plant leaves to sag, at this time to immediately spray water to the leaves, and then into the basin watering, watering attention to step by step, do not water too much at one time.

When the weather is dry and the indoor humidity is low, yellow leaves will appear. Especially in the areas where indoor coal fire and heating are used in winter, the disease is more serious. At this time, you should often spray and wash branches and leaves with water close to room temperature to increase air humidity. In summer, water is often sprinkled on the ground, which makes the local environment humid.

[improper fertilization]

During the growth period of calendula, long-term non-fertilization or insufficient fertilization will cause the phenomenon of yellow leaves. When fertilizing too much, it is difficult for flowers to absorb excess fertilizer, which will cause root burns and affect the absorption of water and nutrients.

Fertilize once a week in summer, do not fertilize too much. If you fertilize too much, you can water more to dilute the fertilizer in the soil. Lack of fertilizer will lead to soil hardening, should be fertilized immediately, effective within a week, and then fertilized on schedule to make the flowers grow normally.

[suffering from cold]

Calendula leaves the room early and is hit by the cold wind, or the autumn cold does not enter the room in time, causing the flowers to freeze and cause yellow leaves. Therefore, we should do a good job of cold prevention in early spring and late autumn.

[diseases and insect pests]

Calendula leaves yellowing phenomenon is often caused by mosaic disease, leaf yellowing will also appear yellow-green mosaic spots, we should pay attention to timely prevention of diseases, timely spraying and give adequate light and ventilation.

The efficacy and function of calendula:

The efficacy and function of calendula have two different meanings. Calendula, also known as Calendula, belongs to the genus Calendula of Compositae. With short plants, dense flowers, bright colors and long flowering period, calendula is the most common herbaceous flower in early spring gardens and cities.

Time: 2019-06-01 Click: