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For scale insects, bamboo skewers can be used to scrape off, and No. 20 petroleum emulsion can also be sprayed with 200 times water. For soot disease, it can be scrubbed with water, or sprayed with carbendazim 1000 times for prevention and control.
The pests that are harmful to gardenias are aphids, jumping beetles and moth larvae, the first two can be dimethoate, trichlorfon, and the latter can be controlled or manually captured by 666 powder.
I don't know how to upload**
You can look up their ** according to the insects I provided for you, and then look up their ** on the Internet, see what kind of insect your gardenia is being harmed by, and after you are determined, you can look at the above methods and go to the flower market to buy medicine
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It is recommended that you sell some pesticides to apply, buy dichlorvos or dimethoate... Personally, it is recommended to spray pesticides outdoors, because the smell of pesticides is very smelly and not easy to volatilize indoors... Or buy some aldicarb and sprinkle it in a pot, this is a pesticide that can be absorbed by plants, if the plant absorbs, the insect will be poisoned to death if it eats the plant, but I personally do not recommend this pesticide, because it is very toxic, more powerful than dichlorvos and dimethoate...
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Actually, it's nothing! I've planted gardenias, too! Those bugs came here because of the smell of flowers!
It will not affect the growth of gardenias. Of course! It is the law of nature that flowers bloom and fall!
It's normal for those bugs to like flowers! Butterflies love flowers, too!
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Really, no matter how simple the question is, isn't it just a few leaf-eating insects? Just get some cigarettes soaked in water and spray.
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In the first case, when there is a lack of iron, gardenias require slightly more iron than other plants. When raising gardenias, you should add a little ferrous sulfate at ordinary times, and ferrous sulfate should be added regularly for gardenias. According to the proportion, it should be added once every three months to meet the normal growth needs of gardenias.
Of course, the potting soil that was changed a little better, it may be enough to add it once in the middle of the year, iron is still very important for gardenias, ferrous sulfate is also a common fertilizer for gardenia fans, but please remember that don't keep adding, too much iron will also cause poisoning.
The second situation is the lack of nitrogen fertilizer, this situation is relatively rare, very long friends will be really lazy, really only watering, do not do other management, and even two or three years do not change the soil, the potting soil in the gardenia has been very compact, nutrients are also absorbed very little, nitrogen fertilizer is the most elements contained in the soil, but it is also the element that plants demand the most. If the leaves turn yellow due to lack of nitrogen fertilizer, you only need to add a quick nitrogen fertilizer quickly, and it can be treated in 3-5 days.
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When changing pots in autumn, the roots of the gardenia may be injured, and then the leaves turn yellow because the soil may be too acidic, or too alkaline, and a part of the soil needs to be taken out to test whether it is too acidic or too alkaline.
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When we water more, the new leaves will show yellowing, relatively speaking, the old leaves will not appear yellow, if we water too little, the leaves of the plant will have problems whether they are new leaves or old leaves, for example, the new leaves are yellow, the old leaves fall and so on.
Generally speaking, the weather with strong sunlight is better for us to move to indoor vents, strong sunlight will cause the leaves to appear yellow spots, and insufficient sunlight will cause the leaves to fall off faster and also appear yellow, so it must be targeted This is very good.
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Method 1: Slowly acclimatize to the environment.
Gardenias that have just been bought from the market and are suddenly moved from the greenhouse to a new environment may cause their leaves to turn yellow due to their lack of adaptation.
Solution. Remove the yellow leaves, observe for a period of time, if there are no symptoms, as long as you pay attention to daily maintenance, and the leaves will not turn yellow when the plant slowly adapts to the environment.
Method 2: Water more.
Gardenias are water-loving and tend to grow in the south, but in the north, they are drier and the air is not humid enough, so the leaves will turn yellow.
Resolution. It is best to place the gardenias in a large tray with water around the tray and at the same time, take care to sprinkle the leaves with water every day so that the leaves are fully moistened.
Method 3: Supplement acidic water gardenia likes acidic water, like alkaline water in the north, watering too much, causing yellowing of leaves.
Resolution. Do not pour alkaline water, if it is tap water, you need to leave it for two days before watering.
Method 4: Reasonable fertilization of yellow leaves caused by excessive or excessive concentration of fertilization.
Resolution. Watering gardenias with plenty of water to dilute the fertilizer concentration in the soil, if yellow leaves still appear, you need to remove the pot and change the soil and wash the roots.
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Change the soil, the soil is not good, and the soil should be loose and breathable
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After changing the pot, I don't accept the pot. After changing the pot, it is best to cover it with a plastic bag or plastic wrap, tie more ventilation holes, and water less. Gardenias should not be allowed to suffer from drought.
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Watering causes, watering problems will affect the yellowing of gardenia leaves, especially when we water more, the new leaves will show yellowing, relatively speaking, the old leaves generally do not appear yellow, if we water too little, the leaves of the plant will have problems whether they are new leaves or old leaves, for example, the new leaves are yellow, the old leaves fall and so on.
Generally speaking, it is better for us to move to indoor vents in the weather with strong sunlight, strong sunlight will cause the leaves to appear yellow spots, and insufficient sunlight will cause the leaves to fall off faster and turn yellow, so it must be targeted.
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Don't worry, gardenia is woody, it is dormant in winter, it sheds leaves normally, it will be fine in spring, and it can germinate again.
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I don't know how to raise flowers, but I used to use different pots to raise flowers, and the effect of raising them was different.
It's okay to raise in the old old pots, just because the old pots are not good-looking, and after changing the pots with colors, the flowers don't grow well.
I think it may have something to do with the material of the pot. Although the new flower pot is beautiful, the air permeability is poor, and it is easy to make the plants soak in the pot after watering, and it is also easy to seep water too quickly, so it is easy to have yellow leaves.
A good pot should be like soil, which can absorb excess water and release some water when there is less water to help the flower grow.
On the other hand, the new flower pot has poor water retention and fast water seepage, which is easy to cause the flowers to appear soaked when there is water, and once the water volatilizes, it is particularly dry.
Therefore, it feels like the new pot is not so ideal. If you have an old flower pot, you can change it back to try it...
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Change the soil, take off the yellow leaves, prune the branches, now it's just spring, and when the weather is warm, it will regenerate new leaves, don't give up.
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When you water the flowers, you should water the flowers with the beer and water that you drink or the rest of your family, and then come and water the leaves of the flowers again, a total of two times, and it should come back to life in two days.
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Watering too much leads to gardenia yellow leaves, I have raised two pots of gardenias are because of watering too diligent waterlogging, it seems that diligent people can not water indiscriminately. Only put it in the sun and let the water dry in the pot.
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Gardenias bloom and bloom, the nutrients of the soil are not good, you change the soil, this is the result of your potting, and watering may also be a problem, flowers, not easy to raise at home, no sunshine bathing, no fresh sudden, not good to survive.
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Gardenias are not very easy to raise, I have never been able to raise them, and I also want to ask for advice to find someone who understands.
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Poor gardenia is not long in life.
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If there is a problem with the soil quality, change the nutrient soil, and do not expose it to the sun, see the sun properly, and keep ventilation.
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I don't know that, you can ask the flower seller, and he'll understand.
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When watering more, the new leaves will show yellowing, relatively speaking, the old leaves will not appear yellow, if we water too little, the leaves of the plant will have problems whether they are new leaves or old leaves, for example, the new leaves are yellow, and the old leaves are falling.
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You've been sitting indoors for too long, right? Although gardenia is a shade-tolerant plant, it still needs to have scattered light to grow better, and it should be better if you put it in the semi-shade of the balcony for a while. Please also see if the bottom hole of the pot is unobstructed? Take care to prevent stagnant water.
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There are many cases of yellow leaves, if the root system of the landlord's flowers is not damaged, you can try the following methods. (own experience).
1: Don't over-water, don't water, don't water, watering thoroughly.
2: Buy some ferrous sulfate and use it as instructed. (Can be dissolved by spraying on the leaf surface) 3:
Apply organic fertilizer, if there is no organic fertilizer, you can buy special fertilizer 4: increase the light, not less than two hours a day, (the sun is too strong at noon, move to the shade) the landlord said incompletely, it feels like it is a lack of fertilizer, gardenias are like fertilizer, especially when they are about to bloom. It is also possible that the soil is low in acidity.
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I didn't move the pot directly back to the pot, the flowers I bought were cultivated with culture medium, and the ability to save water and fertilizer was very poor.
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Mine and yours a situation and is the leaves are yellow buds all down I also checked a lot of information yesterday I was angry and changed a pot for him When I changed the pot, I found that the original soil was hardened and very hard and could not seep into the water I changed a part of the soil and then watered a lot more water The water must be dried and not directly poured tap water Then this morning it was fine The leaves are not wilting Very energetic.
It is estimated that it is a matter of soil.
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Gardenia likes warm, moist semi-shaded environment, slightly shade-tolerant, afraid of strong light exposure, summer should be placed in the shade or flower shade and other places with scattered light maintenance, so it is suitable to use humus rich, fertile acidic soil cultivation, generally can choose 3 parts of humus, 2 parts of sandy soil, 5 parts of garden soil mixed preparation.
Watering should be rainwater or fermented rice washing water; If it is tap water, let it dry for 2 to 3 days before using it. During the growth period, water the ferrous sulfate (alum) containing water once every 7 10 days or apply alum fertilizer water (the two can be carried out alternately), which can not only prevent soil alkalinization, but also supplement the iron in the soil, which can not only prevent the leaves from yellowing, but also make the leaves green and bright, and the flowers are hypertrophied.
Gardenias like moisture, and should be watered frequently and sprinkled on the ground around the plant in spring, summer and early autumn to keep the soil and air moist and make the plant grow vigorously. However, after heavy rain, it is necessary to pour out the stagnant water in the pot in time to prevent root rot.
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The gardenia I bought for the first time also began to wither in 3 days, and then died, because the soil used was too fine, and the soil at the bottom of the pot was too wet and not breathable. Now I have planted 6 more trees, readjusted the soil, added more coarse material, put them in a cool place, there are no dead leaves, and they grow very well.
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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. 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. The yellow of drought and water deficiency is not the same as the yellow of water more, the yellow of water shortage 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.
The scorching yellow strong sunlight shines directly on some shade-loving flowers (such as spider plant, hosta, etc.), which is easy to cause the leaf tips and leaf margins of flowers to wither, and the sunny part of the leaves to appear yellow spots. Move to the pubic area. Lack of light yellow for a long time in the shade environment, the leaves do not get enough sunlight, can not form chlorophyll, the whole leaves turn yellow and then fall off, supplemental light can avoid this disease.
The yellowing of flowers caused by excessive fertilization or excessive concentration is manifested in 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 fertilizer 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. --I can't finish sending you an attachment to take a look!
I found it from the library.
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