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1. The leaves of gardenias are yellowed due to excessive watering.
The yellowing of the leaves caused by overwatering of gardenia flowers is dark yellow and dull of young leaves, no obvious change in old leaves, small yellow-green branches, and new shoots are shrunken and not long, indicating excessive watering.
Solution: Depot the flowers and put them in a ventilated and cool place to dry the soil mass before putting them back into the pot.
2. The leaves of gardenias are yellowed due to drought.
The yellowing of water-deficient leaves is not the same as the yellowing of water-hungry, the yellowing of water-deficient leaves is withered and dry at the 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.
Solution: Pay attention to watering enough and water thoroughly.
3. The leaves of gardenias are yellowed due to strong direct light.
Strong direct sunlight 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.
Solution: Move to the shade.
4. The leaves of gardenias are yellowed due to lack of light.
If the leaves are shaded for a long time, the leaves will not get enough sunlight to form chlorophyll, and the whole leaves will turn yellow and then fall off.
Solution: Supplemental light exposure can prevent this condition.
5. The leaves of gardenia are yellowed due to excessive fertilization.
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 yellow.
Solution: Fertilizer should be stopped immediately, and part of the fertilizer should be washed and rinsed with a large amount of water.
6. The leaves of gardenia are yellow due to lack of fertilizer.
The yellowing of the leaves of gardenia due to lack of fertilizer is manifested in the light color of the young leaves, which are yellow or light green, while the old leaves are more normal or gradually turn from green to yellow.
Solution: Check the potting soil, if there is a dry knot phenomenon, the soil should be replaced, usually thin fertilizer is applied diligently and some alum water is poured in a timely manner.
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Gardenias. The phenomenon of yellow leaves often appears, and it is necessary to use "ferrous sulfate" correctly and skillfully, and the leaves will restore the oil green.
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Gardenias. Yellowing of the leaves is not necessarily a lack of ferrous sulfate.
It can also be caused by a lack of water.
This phenomenon can also occur when the temperature is high, the ventilation is not ventilated, and the humidity is low.
If you use ferrous sulfate, it is best to pour it in a pot with water.
Not sprayed on the blades.
This hurts the leaves. The proportions must be adjusted well.
Basically, it is done once every half a month.
When the leaves are yellow, they can't turn green right away.
It's going to take time.
Leaves that are too yellow.
Won't turn green. Only drops.
However, the new leaves will not turn yellow.
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The gardenia is watered with ferrous sulfate, and the leaves are still yellow, which is the wrong way to use Baijia.
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Citric acid followed by ferrous sulfate will not turn brown.
Ferrous sulfate and citric acid are the formula summed up by many flower friends who have raised flowers many times, because simply adding ferrous sulfate to water, after mixing, the ferric will be oxidized to trivalent iron, so the pale green ferrous sulfate is added to the water and mixed to become rust colored, so the effect of ferrous sulfate solution watering flowers is very poor.
Therefore, in order to protect bivalent iron, vinegar, citric acid and other acidic substances are generally added to the water first, but vinegar or acetate often contains salt, so the watering effect is not very good, so citric acid is mostly used.
The specific preparation method is to add citric acid to the water to prepare 2000 times the liquid, and then add ferrous sulfate to prepare 500 times the ferrous sulfate solution after mixing evenly, so that the preparation is a yellow-green solution instead of rust color.
Precautions: For raising flowers, sometimes the yellowing of the leaves is not necessarily caused by soil acidity and alkalinity, iron deficiency, etc., we use ferrous sulfate often only to maintain soil acidity, and when plants are deficient in iron, the best way to supplement iron is to spray chelated iron, absorb well, if there is a large area of yellow leaves.
At this time, it is not only necessary to acidify the soil, but also need to spray chelated iron on the foliar surface so that the symptoms can be quickly relieved, of course, the potting soil should be kept loose and breathable, and the water will also be yellow, and the lack of magnesium, calcium and other elements will also lead to yellow leaves, so in addition to regularly acidifying the soil, it is also necessary to regularly use some compound preparations of medium and trace elements.
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Gardenias can be made with ferrous sulfate.
Ferrous sulfate is used in agriculture to regulate soil pH and promote the formation of chlorophyll (also known as iron fertilizer), which can prevent and control yellowing caused by iron deficiency in flowers and trees. It is an indispensable element for acid-loving flowers and trees, especially iron trees. It can also be used as a pesticide in agriculture to prevent and control wheat smut, apple and pear scabs, cherry blossoms, and fruit tree rot disease; It can also be used as fertilizer to remove moss and lichen from tree trunks.
It can also tolerate shade and shade, and the leaf color is dark green under shade conditions, but the flowering is slightly poor; It prefers warm and humid climates, is heat-tolerant and slightly cold-tolerant (-3), prefers fertile, well-drained, acidic light clay loam, and is also resistant to drought and barrenness, but the plants are prone to aging. Strong resistance to sulfur dioxide. The tillering power and germination power are strong, and it is resistant to pruning and renewal.
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In this case for gardenias, ferrous sulfate must be used, otherwise it will be too late.
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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.
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.
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Try inserting a few iron nails into the pot. When the nails rust, they can turn the soil into acidic. Gardenia is a southern plant that is not suitable for the alkaline soils of the north.
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The LZ flowers are right to be placed on the east balcony, which is good for absorbing light. It is also correct to add iron supplements.
But now that it's spring, and the plants are starting to sprout and bud, I suspect there may still be a nutrient deficiency. It is likely that LZ neglected the work of spring pruning.
Gardenia is a shrub species that germinates and pulls branches easily, and often the foliage is too luxuriant and looks lush, but it is actually difficult to raise. There are too many branches, and most of them are thin branches and weak branches, which are difficult to provide sufficient nutrients for leaf growth, and even further budding and flowering.
The best thing to do is to trim properly. Prune weak branches, thin branches, branches with poor direction, branches with no future, remove overly dense top buds, and leave a bud on one branch. The same is true for flower buds, leaving one on the thick branch and only one on the weak branch, or simply pruning the branches.
In short, a principle, go to the weak and stay strong. This is the right way to prevent nutrient dispersion** and thus ensure successful flowering and thriving.
According to this method, gardenias should be easy to take care of, and lz should be confident, after gardenias solve the problems of water, light, and pruning, they are generally very easy to raise.
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Don't use ferrous sulfate for gardenias "at every turn", distinguish the reason, and use homemade water.
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It is best to add it to water to avoid overdose.
Gardenia is the indicator plant of acidic soil, so the slightly acidic environment of the soil is the key to determine the growth of gardenia, which directly affects the absorption function of the root system. Therefore, it is advisable to control the pH value of the soil in between.
Method: Buy a pH test strip (2 yuan, which can be used for a long time) in a western pharmacy to measure the acidity of water with ferrous sulfate (vinegar is also OK) and then water the flowers in between, as a basis for adjustment. Test it every time.
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It cannot be buried in the ground. According to the instructions, it should be prepared with water, watered or sprayed on the stems and leaves of the plant.
Cultivation of gardenias.
1. Soil: Gardenia is an indicator plant of acidic soil, so the slightly acidic environment of the soil is the key to determining the growth of gardenia. The culture soil should be mixed with 7 parts of slightly acidic sandy loam laterite and 3 parts of humus. It is advisable to control the pH value of the soil in between. >>>More
There are many varieties of gardenias, which are introduced below. >>>More
1. Gardenia flowers bloom from May to June, and the fruit ripens from November to December. >>>More
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If you want to raise gardenias well, you need to pay special attention to 3 points: acidic soil; Plenty of light and regular pruning and thinning during the growing season. Doing the above three points can avoid the occurrence of yellow leaves, only long leaves without flowering, and some common pests and diseases.