Known to most indoor flower lovers, the Chinese rose or hibiscus (Hibiscus rosa-sinensis) is considered an exquisite and luxurious plant and is grown by many growers at home. This indoor pet attracts attention with its unusually bright and large-sized red, pink, lilac, yellow or white flowers against a background of rich rich green foliage.
Hibiscus is a capricious plant, it is necessary to care for it strictly according to certain rules. Indeed, with the slightest changes in favorable conditions of detention, the Chinese rose responds with the loss of its decorative qualities. Then suddenly the leaves begin to turn yellow, and then a real leaf fall happens. There is always an explanation for this behavior of an indoor flower. It is possible that this is due to illness or the appearance of pests, or maybe the hibiscus is under stress. It is important for a flower grower to quickly establish the cause of negative changes and take urgent measures to save the plant.
Why do hibiscus leaves turn yellow and fall
Violation of the watering regime
Hibiscus aged more than four to five years needs a lot of irrigation water every day, as required by its root system. In between waterings, the soil in the flower pot should not be wet, but always slightly damp. An excess of moisture in the soil can lead to compaction of the soil and poor air permeability, which will lead to rotting of the root part and waterlogging of the soil surface.
Stagnant water and swampy soil create favorable conditions for the appearance of harmful bacteria and various fungal diseases. Under such conditions, the root system of the plant begins to slowly die. She no longer has enough nutrients for the growth and development of the flower, so the leaves begin to turn yellow and gradually fall off. This process must be stopped at an early stage, then the hibiscus can still be saved.
Usually, a young plant cannot cope with abundant watering. It is recommended to urgently remove it from the flower container, rinse the roots, all rotten and blackened parts must be completely cut off. Then it is necessary to treat all the places of the cuts and the remaining roots with fungicides, sprinkle with the Kornevin preparation and transplant the indoor flower into a new flower container and fresh substrate. Immediately after planting, you need to spray the entire crown of the Chinese rose with a solution based on "Epin".
In an adult hibiscus, foliage often turns yellow and falls off due to a lack of moisture in the soil. Constant overdrying of the earthen coma depletes not only the root system, but leads to the wilting of the entire leaf mass. In this case, it is almost impossible to save a houseplant.
Insufficient lighting
The rose can thrive in bright sunlight and grows well in shady conditions.But sharp changes in the level of illumination (for example, the transfer of hibiscus from the street to the room and vice versa) can lead to yellowing and loss of foliage.
When a flower moves to a poorly lit room, it is necessary to use fluorescent lamps and illuminate it for an additional several hours a day for some time in order to prevent the plant from falling into a stressful state. When transferring hibiscus from home to street, it is very important not to immediately put it in direct sunlight, but to do it gradually. First, it is necessary to shade the flower at midday and protect it from sunburn.
Temperature violation
The Chinese rose prefers to be kept in warm conditions with temperatures ranging from 18 to 30 degrees Celsius. A decrease and an increase in temperature beyond these limits adversely affects the plant. It is also not recommended to allow cold drafts and sudden temperature fluctuations. In a cool room, you need to put a heater, and in a hot room, use spraying and raise the humidity level.
Lack or excess of fertilizers
When fertilizing soil with indoor plants, you need to know exactly what nutrients are important for a given specimen. An overabundance or deficiency of certain substances can harm the indoor pet. For example, elements such as magnesium and potassium are very important for the development of hibiscus and should be present in increased amounts. But a large amount of nitrogen and phosphorus can cause discoloration of the leaves and lead to complete yellowing. There is even such a thing as "nitrogen burn". That is why experienced flower growers recommend choosing such dressings that contain a lot of potassium, and without nitrogen-containing and phosphate fertilizers, the Chinese rose will not disappear. The nutrient mixture should only benefit the indoor flower.
Pests
One of the most dangerous and common pests of hibiscus is the spider mite. It is almost impossible to notice its appearance at first. The leaves of a houseplant turn yellow, wither and begin to actively and in large quantities fall off and it is not immediately possible to understand that the reason is in the appearance of a pest. Only after a while, with the naked eye, you can see small black dots (with barely noticeable movement) on the thin threads of the cobweb.
There is no way to do without the help of various chemicals. Specialized retail chains for gardeners and florists offer preparations such as Fitoverm, Aktara, Aktellik to combat spider mites. With their help, the crown of the shrub and the entire plant as a whole are processed.
The appearance of the disease - chlorosis
This disease is capable of completely destroying the plant in a short time. First, the leaves die, and then gradually the shoots and the whole flower. Hibiscus suffers from chlorosis when the soil is moistened with hard irrigation water, with a large amount of alkali in the soil, with an insufficient amount of fertilizers and dressings, and also with a lack of iron. You can save an indoor flower by transplanting it into a new soil mixture and adding fertilizers containing iron into it.
Natural causes
Some indoor plant lovers begin to panic, even if one or two leaves have fallen from the hibiscus, or they have turned a little yellow. This happens when the hibiscus is actively developing, it has many new leaves, and the old ones die off. There is nothing wrong with this process, natural changes take place in living nature.
And what about the big plant on the floor, how is it? Spraying is not enough?
My Hibiscus is two meters high, and how can I wash it in a horizontal position, and even every leaf, even a day is not enough for me?
Hello. I have a Hibiscus 1.5 m in height and 1 m in volume. Yes, he occasionally drops foliage. But this does not happen all at once, but in places, and gradually. But after it blooms profusely. Straight explosion of color 🙂 I only have time to artificially pollinate, with a soft brush for painting each flower. After pollination, the box is tied, it should be fully ripe. On the plant, it should turn yellow and begin to dry out and open up. If the seeds themselves fall out of the box, then you can cut the box and pull out the remaining seeds. Seeds are medium in size, like a match head, black color. The flowers are very beautiful, it's a pity they don't smell любит The plant loves watering. But personally, I water it every other day or two, try not to water the plant. In the summer, the plant needs more water. Since the plant is very sensitive to external temperature. The higher the temperature, the more water you need. This can be seen on the soil, the soil dries up, loosen and water. It is better to water with boiled water and settled. Since there is a lot of calcium in the water and rust from the pipes. Fertilizers Azofosk but not often watered once a year in summer, when the plant blooms profusely.