The leaves of the flowers are yellow. What is missing? What elements of fertilizer should be applied?

Lack of magnesium, iron, manganese and calcium. Fertilizers containing magnesium, iron, manganese and calcium should be applied.

Symptoms of lack of flowers and plants?

1, the growth of nitrogen deficiency is hindered, the leaves are small and pale, the leaves are sparse and easy to fall off, which affects photosynthesis, so the growth is poor, the plants are small, the branches are few, and the fruits are few. ?

2. The growth of phosphorus deficiency was inhibited, the plant was short, the leaves turned dark green, the color was dark and dim, with purple spots, and finally died and fell off. ?

3. Brown spots appear on potassium-deficient leaves, abnormal wrinkles appear, leaves curl, and finally they are scorched, with symptoms such as burning. ?

4. The growth of calcium-deficient roots is inhibited, the roots are many and short, the cell wall is glued, the root tip cells are destroyed and rot occurs. ?

5. Magnesium deficiency causes yellowing, yellowing and white flower disease. Magnesium-deficient flowers often fade and turn yellow from the lower leaves of plants and gradually spread to the upper leaves. At first, the veins remain green, then they turn yellow, and soon the leaves below turn brown until they die. ?

6. When iron deficiency occurs, the tender leaves on the upper branches are damaged, and the old leaves on the lower branches remain green. When the iron deficiency is slight, the mesophyll tissue of the flower is light green, and the veins remain green. In severe cases, the tender leaves are all yellow and white, with withered spots, which gradually scorch and fall off. ?

7. When the flowers lacking manganese are deficient in manganese, the leaves first fade with a little gray, and then brown spots are found at the tip of the leaves, which gradually spread to other parts of the leaves. Finally, the leaves quickly withered, and the plants grew weak and could not become flowers.