Iron deficiency yellow leaf means that the plant lacks iron element, which affects the synthesis of chlorophyll, leading to yellow leaf. If iron nails are inserted in the basin, it can prevent yellow leaf.
Find two rusty iron nails or screws, bury them in the soil along the edge of the basin, or bury them in the middle and lower part of the basin soil when changing the basin. The divalent iron ions released slowly will be absorbed by flowers and plants.
Iron nails dissolve well in acid soil and slowly in alkaline soil, so if you want to use iron nails to avoid yellow leaves of plants, you need to adjust the pH of soil.
Iron nails release iron ions slowly, which is more suitable for prevention. If the plant has yellow leaves, the new leaves turn yellow and the veins turn green, it is better to use ferrous sulfate to save lives.
For plants with yellow leaves, it is necessary to prepare 1000 times of ferrous sulfate mixed with water, and use it now. Spray the flowers once every 15 days. Generally, the yellow leaves will turn green after 2-3 times of application.
For the plants without yellow leaves, ferrous sulfate can also be used to mix 2000 times of water, and the flowers can be watered once every two months for prevention, which is suitable for azalea, orchid, gardenia, etc.
Flowers can't live without iron, and iron ions can't survive in alkaline environment, so if you want to prevent yellow leaves, you can also start from adjusting the pH of soil, such as sulfur powder.
Sulfur powder can reduce the pH value of the soil, make the soil become slightly acidic, and its efficacy lasts for a long time. It can be applied once a year, and it has the efficacy of killing insects and preventing insects.
When changing soil for flowers in spring and autumn every year, add 0.1% sulfur powder according to the weight of soil, that is, fill 1L flower pot with soil and add 1g sulfur powder.
If you feel that the nails are slow to work and there is no medicine, it's better to try to pour some peel water on the flowers. Every time you pour some water on the flowers, it can also reduce the pH value of the soil and nourish the flowers.
Usually, the leftover fruit skin is cut into pieces. According to the ratio of water: peel: brown sugar = 10:3:1, it is 2 /3 of the height of the plastic barrel. It is fully mixed and retouched, and the cover is opened every day to deflate.
2-3 months later, open the bottle cap and smell it. There is no odor, but a clear fragrance. It means that the retting is successful. Usually, dilute it 10 times with water, and water the flowers once a half month.
