Gardenia leaves turn yellow in winter, what causes it?

During the growth of gardenias, the leaves often turn yellow, and the reason is mostly caused by poor cultivation management. Too much water, too little sunlight, too much or too little fertilizer will cause yellowing of leaves, but the yellowing situation is different, and the causes should be carefully observed and analyzed, and corrected.

Water yellow The young leaves are dark yellow and dull, the old leaves have no obvious changes, the branches are small yellow-green, and the new shoots are shrunk and not long, indicating excessive watering. Depot the flowers, put them in a ventilated and cool shade, and dry the soil ball before putting them back into the pot.

Dry yellow The yellow of lack of water is different from the yellow of more water, the yellow of lack of water is the withering and dry leaf tips or edges, and the old leaves are withered and yellow from the bottom to the top, but the growth of new leaves is relatively normal. Pay attention to watering when watering enough, water thoroughly.

Burning yellow strong sunlight directly on some shade-loving flowers (such as spider plant, hosta, etc.) is easy to cause the leaf tips and leaf margins of flowers to wither, and the sunny part of the leaves appears yellow spots. Move to the pubic area.

Lack of light yellow long-term shade environment, the leaves do not get enough sunlight, can not form chlorophyll, the whole leaf turns yellow and then falls off, supplemental light can avoid this disease.

Yellowing of flowers caused by excessive fertilization or excessive concentration is manifested in the appearance of dry brown at the top of the new leaves, and the general leaf surface is thick and dull, and the concave and convex are not stretched, and the old leaves are scorched and peeled off. Fertilization should be stopped immediately, and part of the fertilizer should be washed with plenty of washing in severe cases.

Lack of fat yellow is manifested in the color of young leaves becoming lighter, yellow or light green, while old leaves are more normal or gradually turning from green to yellow. Check the potting soil, if there is a dry knot, the soil should be changed, and the thin fertilizer should be applied frequently and some alum water should be poured in a timely manner. Hope.

The following two points are caused: 1. The weather is cold 2. There is too much sprinkling.

1. The temperature is too low. Temperatures that are too low are a major cause of yellowing of gardenia leaves in winter. Because in winter, the temperature is generally relatively low.

If the temperature is lower than five degrees Celsius, the gardenia leaves are very susceptible to frost damage, which is prone to yellow leaves, and in severe cases, it will lead to frostbite or even freezing to death. Therefore, when we breed gardenias in winter, if the temperature of open-air breeding is lower than five degrees, then we must do a good job of keeping warm in time. It can be moved indoors or covered with a plastic bag and then opened at noon every day for ventilation.

2. Overwatering. In the winter time, because the temperature is relatively low. Therefore, the evaporation rate of water in the soil will be relatively slow, and if the watering is carried out according to the previous watering frequency, the soil water will evaporate too slowly, resulting in water accumulation in the soil.

As a result, the roots are rotted by water, resulting in yellowing of the leaves of the plant. Therefore, in the case of low temperature in winter, we should pay attention to control the watering work and extend the watering interval appropriately. Water when the soil is too dry.

You can also insert a bamboo pole in the soil, and if the bamboo skewer is pulled out and dry, it can be watered.

3. Lack of light. Natural light is relatively short in winter, and the intensity of light is not very large. The growth of gardenia has a relatively large demand for light, so in winter, if the gardenia is in a weak and dark environment for a long time, it will have a very big impact on the growth of gardenia, resulting in yellowing of gardenia leaves.

Winter sunlight is generally mild, so we can let gardenias receive sunlight directly to promote nutrient accumulation. If there is not enough natural light, then we need to do a good job of artificial lighting.

4. Improper fertilization. In winter, due to the low temperature environment, gardenia plants generally enter the dormant period. When gardenias enter the dormant period, their fertilizer absorption ability is relatively weak, so we can't apply fertilizer indiscriminately in winter.

If the fertilizer is improper, the gardenia plant can not be effectively absorbed, and it is easy to cause fertilizer damage, resulting in yellow leaves. Therefore, it is best not to fertilize in winter to ensure that gardenias overwinter safely. Wait until the spring of the second year to properly chase the spring and apply alum fertilizer and water to supplement its nutrition.

1. Maintain the temperature. Gardenias' yellow leaves in winter may be caused by low temperatures. Gardenias are suitable for growing in a warmer environment, but the temperature is too low in winter will cause gardenia frostbite and yellowing leaves, so when maintaining gardenias in winter, they need to be kept indoors for maintenance, and the temperature should be controlled at more than ten degrees to maintain the normal growth of gardenias.

2. Reduce watering. Gardenias' yellow leaves in winter can also be the result of overwatering. Gardenias are suitable for growing in a more humid environment, but in winter the water evaporation is slow, at this time it is not advisable to provide too much water for gardenias, it is best to decide whether to water according to the color of the soil, generally after the soil is whitened can be replenished with water.

3. Stop fertilizing. Gardenia grows slowly in winter, and the fertilizer provided at this time can not be absorbed by the gardenia, resulting in fertilizer damage to the gardenia, so that the leaves are yellow, so it is necessary to stop providing nutrients for the gardenia in winter, and if you want to fertilize, you also need to dilute the fertilizer and use it, so as to avoid the phenomenon of fertilizer damage causing the plant to not survive the winter.

4. Pay attention to ventilation. Gardenia yellow leaves may also be infected with the disease, at this time it is necessary to immediately remove the part of the gardenia infected with the disease, and then disinfect the wound, and replace the soil for the gardenia, choose the nutrient-rich soil after disinfection and replant the gardenia, and at the same time put the plant in a ventilated environment, spray the sterilizer regularly, so that the plant grows healthily.

The yellowing of gardenia leaves is caused by lack of water, too much sunlight, and lack of nutrients.

Adjust the watering frequency of the gardenia to water once a day and it will recover. Move the gardenia to a ventilated and astigmatized place to absorb the scattered light and recover. Adjust the fertilization frequency of gardenia to apply nitrogen fertilizer once every 10 days, and it can be recovered.

Gardenias like to live in loose and breathable soil, if watered frequently, it will cause the roots of gardenia to not breathe smoothly, just like someone covered our nose when we breathe, over time, the reaction to the leaves is yellow leaves. In such a situation, it is recommended that you directly repot it, and after turning the pot, first dry the root system in a cool and ventilated place for half a day to a day, and then pot.

Gardenia varieties

1. Gardenia grandiflora: also known as Gardenia grandiflora, is a variant of Gardenia, named because of its large and thick leaves, and its flowers are large and rich in fragrance.

2. Gardenia: also known as Gardenia, the plant is relatively short, the flowers are small, the branches are often flat and creeping, and the leaves are small and narrow.

3. Yellow gardenia: also known as mountain gardenia, the leaves are slightly smaller and the flowers are single-petaled.

4. Ovarian gardenia: The flowers are the same as those of other varieties, except that the leaves are obovate and the front end is rounded.

5. Gardenia microphylla: Especially the gardenia with bird's tongue, the leaves are thick, narrow and sharp, and it is the variety with the lowest requirements for air humidity, which is relatively easy to feed in the north.

6. Gardenia spotted: It is a relatively good-looking variety, its leaves have markings, and the flowers smell very good, and the taste is fragrant.

<> the leaves of gardenias in winter are yellow and dry and the leaves are withered, you can use scissors to cut off the leaves of the plants that are yellow, and then apply disinfectant to the wounds of the gardenia to prevent the wound from being infected with bacteria, and finally apply diluted nitrogen fertilizer to the plants to supplement nutrients for the gardenia and promote the growth of new leaves.

1. Prune.

In winter, the leaves of gardenia are yellow and withered, it is best to use sharp scissors to cut off the dry and yellow leaves of the plant to reduce the consumption of nutrients by gardenias, and then apply disinfectant to the wound of the plant to avoid the wound being infected with bacteria.

2. Provide nutrients.

After the gardenia is pruned, you can apply some nitrogen fertilizer to the plant to supplement the nutrients for the gardenia, so as to promote the rapid recovery of the plant.

3. Provide moisture.

When cultivating gardenias in winter, it is best to water the plants every 1-3 weeks, and the amount of watering needs to be controlled, so that the soil can produce waterlogging, otherwise it will affect the health of gardenias.

4. Precautions.

When cultivating gardenias, you can loosen the soil for the plant every other time to prevent the root system of the plant from being black and rotten due to the impermeable soil, if the root system of the plant is black and rotten, it needs to be cut off in time with scissors, so as not to affect the health of the gardenia.

1. Frostbite at the roots: Because the temperature is relatively low in winter, the roots of this type of plant may be frosted, so that its roots have no way to absorb nutrients from the soil to supply the plant to grow, so the leaves of the plant turn black.

2. Improper watering: Giving too much water to the plant has a bad effect on the roots of the plant, and it will make the roots of the plant rot after a long time. The roots can't give the leaves the nutrients they want, so the leaves become lifeless and turn black.

1. If the degree of frostbite of the plant is relatively mild, you can cut off the blackened leaves at this time, and then put the plant in a warm place for maintenance. If the frostbite is severe, it is necessary to dig the plant out of the soil, cut off its frozen roots, cut off all the branches and leaves, and replant it and place it in a warm place.

2. If you find it early, you can place the plant in a place with good air circulation, so that the water in the potting soil will evaporate faster, and the plant will slowly return to its normal appearance. If a lot of leaves have turned black, dig the plant out of the soil, cut off the rotten roots, disinfect them and replant them in the prepared soil.