Gardenia needs to be supplemented with not only nitrogen, phosphorus and potassium, but also iron during its growth. If it is found that the tender leaves of Gardenia are yellow and white, and there are no signs of anything wrong with the old leaves, it means iron deficiency.
The right medicine:
If you want to change this situation, you have to supplement iron and promote the formation of chlorophyll, so that yellowing can be reduced and it can also play a preventive role. Can be diluted with some ferrous sulfate solution 1000 times and injected into the roots, and sprayed once every 15 days.
The second reason of gardenia yellow leaves: poor soil quality
The poor soil quality of basin soil will affect the growth of root system. Without the root system, the growth of plants is naturally not much better, and yellow leaves are indispensable.
The right medicine:
It is best not to use the pot soil for too long, but it needs to be replaced in about 2 years, so as to ensure that the soil is loose and breathable, which is beneficial to growth. You can use some pine needle soil, nutrient soil and garden soil with the ratio of 5: 3: 2 respectively.
The third reason of gardenia yellow leaves: sunburn
Gardenia itself doesn't like strong light. If the culture environment is bright, it will burn the leaves, resulting in slightly withered leaves and yellow sunburn.
The right medicine:
Usually pay attention to avoid direct glare. It is suggested that gardenia should be kept in astigmatism in spring, autumn and summer except in winter.
The fourth reason of gardenia yellow leaves: rotten roots
Too much water and too much moisture in the soil will rot the roots, and the water will not be normally supplied to the plants when the roots rot, and the leaves on the branches will turn yellow due to serious dehydration. Generally, it turns yellow from the old leaves, and the new leaves gradually turn yellow, but the veins are still green.
The right medicine:
When the roots are rotten, the gardenia should be taken out of the pot in time, the yellow leaves and rotten roots should be cut off together, and the roots should be sprayed with carbendazim, dried in a shady and ventilated place and replanted.
The fifth reason of gardenia yellow leaves: water shortage
Once the soil of gardenia is too dry, it will turn yellow because of the lack of water supply. Generally, it turns yellow from the old leaves until it falls, and the new leaves gradually wither.
The right medicine:
When watering gardenia, you should see it dry and wet, and then water it when the soil is almost dry or when it feels dry. Water thoroughly, but no water.
The sixth reason of gardenia yellow leaves: fertilizer damage
Although fertilization can promote growth, the wrong fertilizer will burn the roots, and the root system will burn out, which will naturally affect the growth of plants. If it is found that the new leaves of gardenia are slightly brown, and the veins turn yellow rapidly, the leaves look uneven, and some leaves are brown and fall off, then it is fat.
The right medicine:
Take off the pot in time, cut off the yellow leaves, clean the root system, water the pot soil with big water to dilute the fertilizer once, and then put the gardenia in the astigmatism to dry first, and then dry it and put it on the pot again.
The seventh reason of gardenia yellow leaves: insufficient light.
Although gardenia doesn't like direct sunlight, it's not that it doesn't like sunlight. If the light in the breeding environment is dark, even if gardenia doesn't die for a long time, its leaves will turn yellow because of insufficient light, that is, it will lack green. Finally, the leaves began to fall off, leaving only bare branches.
The right medicine:
If it is caused by insufficient light, the gardenia should be moved to a place with good light in time, and it can be shaded when the light is strong.
After reading this article, I believe everyone knows something about it. In fact, the yellowing of gardenia leaves is not only caused by waterlogging, so you should pay more attention to raising gardenia!