For those who frequently grow plants, yellowing leaves are a common occurrence. Yellowing leaves have a significant impact on plants, affecting not only their aesthetic appeal but also hindering their growth. So, what causes yellowing leaves? Let's find out below.
1. Lack of sunlight
Most plant leaves turn yellow due to insufficient sunlight. When plants don't receive enough light during their growth process, they cannot perform photosynthesis, and over time, the leaves will turn yellow.
2. Improper watering
Overwatering, leading to persistently wet soil, can cause root hypoxia, hindering nutrient absorption and causing leaves to turn yellow. Conversely, underwatering can cause dehydration, resulting in dull, yellowing leaves that may even wither.
3. Improper fertilization
Nutrient deficiency in plants can cause leaves to turn yellow. For example, a lack of essential nutrients, especially iron, can cause leaves to yellow. Conversely, over-fertilization can also lead to scorched and fallen leaves. If too much fertilizer is applied , fertilization should be stopped and the plant should be watered immediately to flush out the excess.
4. Temperature too low
Most plants are not very tolerant of low temperatures. When the temperature is too low, their leaves will generally turn yellow and fall off. This is because low temperatures inhibit plant growth, and when a plant enters a dormant state due to low temperatures, its leaves will turn yellow and fall off because of insufficient nutrient supply.
5. Unsuitable soil
Plants have specific requirements for soil pH. An unsuitable soil pH can affect the absorption of certain nutrients by plants, leading to yellowing of leaves.
6. Dry air
When indoor air is too dry, some flowers that prefer a humid environment may experience symptoms such as dry leaf tips or scorched leaf edges.
7. Impact of pests and diseases
If numerous yellow spots appear on the plant's leaves and continue to expand and worsen, it's a strong indication that the plant is likely infected with pests or diseases. In this case, it's essential to examine the plant promptly and treat it accordingly.
