What causes the flowers and leaves raised at home to turn yellow?

Generally speaking, yellowing of leaves can be found from watering, fertilization, soil pH, light, air, pests and diseases.

1. Improper watering: Too little watering and too much watering will cause the leaves to turn yellow. The difference is that when there is water shortage, the leaves will wither and turn yellow from the edge, as shown in the figure below.

If you water too much, the new leaves of plants will turn yellow first, and the old leaves will generally change little. Like this.

2. Improper fertilization

Similarly, too little or too much fertilization will cause the leaves to turn yellow. For many people, they always want plants to eat fat at one breath and unconsciously fertilize too much. At this time, if you look carefully, you will find that the front of the new leaves is brown, the leaves of the old leaves are thick and dull, and even the old leaves are brown.

When too little fertilization or soil hardening leads to insufficient absorption of nutrients by plant roots, the color of young leaves emitted by plants will become pale, that is, unhealthy yellowish or light green. Short-term lack of fertilizer, the old leaves will be more normal, long-term lack of fertilizer, the old leaves will gradually turn from green to yellow.

3, improper lighting

Different plants have different requirements for illumination, some need all-day illumination, and some only need strong scattered light. Even the same plant has different requirements for light at different growth stages. Too much light, for many shade-loving or semi-shade-loving plants, it can be found that the tip and edge of the plants wither, and yellow spots appear where the leaves are irradiated.

But if there is too little light and the leaves lack photosynthesis, there is no way to synthesize chlorophyll. At this time, the leaves of plants will turn yellow and then fall off.

4. The soil pH value is not suitable.

This is often overlooked by many people. Some plants like alkaline soil, while others need acidic soil to grow smoothly. So you must be clear about your plants' preference for soil, so that plants can grow healthily and happily in their favorite soil.

1. Solution to improper watering: The principle of watering is that the soil is wet and dry alternately, that is, the soil surface is white and dry, and it is poured thoroughly at one time until water flows out from the bottom. If the soil is too wet and the leaves turn yellow, put them in the sun or in a ventilated place. If it is serious, take the plants out of the pot and put them in a ventilated place, dry them and put them back in the pot.

2. Solution to improper fertilization: fertilization is based on the principle of thin fertilizer and diligent application, usually once every half a month during the growing period, and no fertilization during the dormant period. If there is too much fertilization, stop fertilization immediately, dilute the fertilizer with water, and let the excess fertilizer flow out from the bottom. You can also transplant some fast-growing grass to quickly consume excess fertilizer. If fertilization is too little, fertilizer should be supplemented appropriately. Plants that don't change pots for two years should change pots or change soil.

3, the solution of improper lighting: understand the demand of the plants you grow for sunlight, so that the plants that can't get the sun are less exposed, and the yellowing phenomenon of leaves caused by improper lighting will be greatly improved.

4. Solution to inappropriate soil pH: Most plants like acidic soil. We can add pine needle humus, sulfur powder, diluted rice vinegar, 0.2% ferrous sulfate solution and fully fermented rice washing water to the soil, which can make the soil acidic. Of course, we suggest using our own compost to improve soil quality. A small amount of lime or plant ash can be added to obtain alkaline soil or to make acidic soil return to normal.