How to deal with the yellowing of old leaves of gardenias

Most of the causes of gardenia yellow leaves are caused by improper management in the cultivation process, such as too much water or insufficient water, too strong or too weak sunlight, too much fertilizer or lack of nutrients. We can only solve the problem of yellow leaves by figuring out the causes of yellow leaves, but how can we know what specific causes of yellow leaves?

Gardenia (details).

1. Caused by excessive water: the leaves are yellow, the young leaves are dark yellow and have no luster, but the old leaves have not changed much, and the new shoots have shrunk but do not grow.

Solution: Place the flowers in a ventilated and cool place, and wait for the excess moisture in the soil to dry out on its own before putting them back in place.

2. Yellow leaves caused by insufficient water: dry yellow, mainly in disguise: the leaf sheath is withered, the old leaves are first yellow and finally fall off, and the growth of young leaves is not greatly affected.

Solution: Since it is caused by lack of water, of course, it is to replenish the water, but pay attention to a certain degree in the process.

3. Yellow leaves caused by too strong sunlight: burning yellow, manifested as leaf sheath or leaf edge wilting, and yellow spots will appear on sunny leaves.

Solution: Move the flowers to the shade.

4. Yellow leaves caused by lack of sunlight: lack of light yellow, because the flowers are hidden in a dark place for a long time, resulting in their inability to synthesize chlorophyll, and finally the leaves are yellow and fall off.

The solution: move the flowers to a sunny place.

5. Yellow leaves caused by overnutrition: the top of the new leaves appears dry brown, and the leaves are yellow and dull.

The solution: stop fertilizing.

6. Yellow leaves caused by nutritional insufficiency: the color of young leaves gradually fades, and finally yellow.

The solution: fertilize the flowers.

Gardenias like warm, moist semi-shaded environment, slightly shade-tolerant, afraid of strong light exposure, summer should be placed in the shade or under the shade of flowers and other places with scattered light maintenance

There's nothing big wrong with this gardenia.

From the **, the yellowing is a small number of old leaves in the lower part, and the leaves on the yellow leaves are normal.

Gardenias will be better to maintain their leaf color in a slightly shaded area; However, the alkaline soil is a problem, and gardenia prefers slightly acidic soil rather than alkaline soil; In the growing season, the ferrous sulfate solution can be poured every 10-15 days, and the ferrous sulfate solution can be poured every 20 days or so in other seasons to prevent soil alkalization.

If it is really yellowed due to iron deficiency, the first yellow is the slightly tender leaves, and the symptoms are: at the beginning of the leaves, except for the veins to keep green, the other parts of the leaves lose green, and in severe cases, the whole leaf loses green. Yellowing begins from old leaves, and magnesium deficiency is generally common.

Gardenia potted soil is prepared with 40% garden soil, 15% coarse sand, 30% manure soil, and 15% humus soil.

Keep the potting soil slightly moist in summer; Watering in spring and autumn should be dry and wet; In winter, it is advisable to control watering and be drier. Excessive watering can also cause yellow leaves.

Gardenia old leaves yellowing phenomenon need to stop watering, if it has not returned to its original state for a long time, you need to take out the potting soil to dry until the soil is completely dry, while ensuring a constant temperature environment of 15 and increase astigmatism irradiation, supplement a certain content of magnesium, apply nitrogen fertilizer every half a month.

What to do when the old leaves of gardenia are yellow, you need to stop watering first, observe for a week, see if the leaves have eased the phenomenon, or the leaves have turned green, and then watering after the complete recovery, on the contrary, if the symptoms are severe, you need to remove it from the pot, place it in a ventilated environment, and replant it after the soil is completely dry.

If the gardenia is cultivated in an environment where the temperature is lower than 0, the old leaves of the gardenia will turn yellow for a long time, and the temperature should be controlled in the environment of 15 for a period of time, especially in the winter when breeding, it is necessary to pay attention to the surrounding temperature environment.

The yellowing of the old leaves of gardenia is likely to be in a dark environment or strong light exposure for a long time, even if the above conditions are met, the light is not suitable will also cause the leaves to turn yellow, so it needs to be placed in a position of astigmatism, or soft light is OK.

Long-term lack of magnesium will lead to yellowing of leaves, at this time you can apply some magnesium-containing fertilizers or solutions, appropriate supplements, can increase the formation of chlorophyll, and then observe whether the leaves have been improved after a period of time, and also give astigmatism in the process of maintenance.

Gardenia long-term lack of nitrogen fertilizer, the old leaves not only turn yellow but also gradually fall, you can apply a nitrogen-based compound fertilizer, the amount of fertilizer can be applied in accordance with the principle of thin fertilizer and light application, must not be too much fertilizer at a time, once every half a month, gardenia can slowly return to its original state.

Gardenia leaves are yellow, and if you treat it in time, you are not afraid of not raising it well.

Gardenia is an acid-loving plant, in addition to watering, fertilizer and other factors will cause gardenia yellow leaves, there is also a yellow leaf reason: iron deficiency yellow leaves, in daily watering can add ferrous sulfate with water to water gardenias, can effectively avoid iron deficiency yellow leaves.

The yellowing of gardenia leaves is mainly due to the following conditions:

1) The manifestation of iron deficiency and iron deficiency is that the veins of delicate leaves lose green and yellow, and the whole leaf gradually turns yellow-white to white.

2) Magnesium deficiency manifestation, the veins of the lower old leaves of the plant first lose green and yellow.

3) Soil stagnant water, poor aeration, and pest and disease damage will cause gardenia leaves to turn yellow.

The main reason is that the root system is damaged when changing pots, resulting in yellow leaves falling off. Notes:

1. The potting soil can not be watered too much, but too much is not conducive to rooting, so it is advisable to keep it moist.

2. Avoid strong light exposure to reduce water transpiration. Shade if necessary.

3. It should not be placed in a too ventilated place, because blowing will aggravate the evaporation of leaf water.

4. Pay attention to the morning and evening foliar spray moisturizing, and try not to let the water fall into the potting soil when the fountain fogs to prevent the potting soil from being too wet.

5. Now you can use the way of topdressing outside the root to supplement the nutrients: urea 5g potassium dihydrogen phosphate 5g + water 1 kg to spray the foliar once every 10 days, spray wet, twice in a row, and the remaining water can be poured into the potting soil or poured out according to the situation. After 20 days, wait for the plant to stabilize and then fertilize the potting soil

According to the growth of the application of full-price long-acting compound fertilizer (long-acting fertilizer containing nitrogen, phosphorus, potassium and a variety of trace elements, such as Huaduoduo, Aoluduo, the dosage refers to the instructions, must use regular manufacturers).

6. If the leaf loss situation is further serious, and it has reached the edge of rescue at this time, you can cut off some of the young branches and young leaves to reduce the nutrient and water consumption of the tree, and at the same time cover the plant with a suitable transparent plastic bag (reduce the water loss of the tree).

There are four types of yellowing**

Iron deficiency. The soil contains too much calcareous, alkali, phosphorus, manganese, etc., which will affect the absorption of iron by the plant, affect the formation of chlorophyll, make the young leaf veins lose green, and spread to the whole leaf, and 1 500 ferrous sulfate water or alum water can be applied once every 10 days.

Magnesium deficiency. Acidic red loam soil and too much potassium and ammonium are prone to magnesium deficiency, so that the lower part of the plant old leaves and leaf veins lose green and yellow, can be sprayed with 1% 2% magnesium sulfate solution, but excessive application of magnesium will cause calcium deficiency and hinder the development of xylem in roots and stems.

The potting soil is too wet or too dry. If it is too wet, it needs to be repotted, and if it is too dry, it needs to be watered.

Summer exposure. Can be moved to a cool place.