Hibiscus rosa-sinensis (Rose of Sharon Hibiscus) Growing Methods, Precautions, and Solutions for Yellowing Leaves

Mulberry leaf peony, namely hibiscus, also known as Buddhist hibiscus and Chinese hibiscus. It is an evergreen shrub and a famous flower of our country, with large blooms and many colors. Although the flowers open in the morning and fall at dusk, they bloom continuously with a long flowering period, and flowering is most abundant in summer and autumn. So what are the cultivation methods and precautions for mulberry leaf peony? What should be done when the leaves turn yellow?

Cultivation methods and precautions for mulberry leaf peony

1. Soil: It can adapt to various soils, but fertile, loose, slightly acidic soil is best.

Site selection and land preparation: Choose a sunny, warm and humid climate, and fertile, loose, well-drained, slightly acidic soil.

2. Temperature: The suitable growth temperature for mulberry leaf peony is 15-25°C, and from October to the following March it is 13-18°C. In winter the temperature must not be lower than 5°C, otherwise the leaves will turn yellow and fall off. Below 0°C it is prone to freezing damage, but it can still grow normally at high temperatures above 30°C.

After Frost's Descent and before the Start of Winter, it must be moved indoors, because mulberry leaf peony is not resistant to frost. The overwintering temperature should not be lower than 5°C, so as to avoid freezing damage; and should not be higher than 15°C, so as not to affect dormancy. When the weather is colder, it can be covered with paper or plastic film to keep warm. Shortly after moving it indoors, open the windows for ventilation every day during the day, pay attention to changes in the dryness and moisture of the potting soil, and water appropriately. On the coldest days, watering helps prevent freezing damage, but fertilizing should stop.

3. Sunlight: Mulberry leaf peony is a strongly sun-loving plant. During the growing season it needs sufficient light to grow and bloom normally. If light is insufficient, flower buds are prone to dropping, the flowers are small, and the flower color is dull; but when sunlight is too intense, the plant will be scorched, so appropriate shading protection should be provided.

4. Watering: During the winter, keep the pot slightly moist. Generally water once every 5 to 10 days, and the amount of water should not be too much, to avoid root rot caused by a low-temperature, high-humidity soil environment. In northern winters, the dry climate can cause phenomena such as pale yellow leaf color and dry leaf edges, so attention should be paid to increasing indoor air humidity. Methods such as spraying and washing the branches and leaves or covering with plastic film can be used to increase the air humidity around the plant and create suitable humidity conditions for its growth.

5. Management: Management is also very important. In early May, when it is moved outdoors to a place with sufficient sunlight, management work such as increasing fertilizer and water, loosening the soil, and pulling weeds should be strengthened. Apply a dilute liquid fertilizer once every 7-10 days. When watering, pay attention to the dryness and moisture of the potting soil; too dry or too wet will affect flowering. Management after autumn should be cautious, and attention should be paid to reducing fertilization later, so as to avoid producing autumn shoots. Autumn shoots are tender and have weak cold resistance, and will suffer freezing damage in cold weather.

6. Repotting: Every year in April, before moving it outdoors, it should be repotted. The soil should preferably be loose, fertile sandy soil. When repotting, also replace it with new culture soil, cut off some overly dense and curled fibrous roots, apply sufficient base fertilizer, and add a little phosphate fertilizer at the bottom of the pot.

7. Pruning: After moving it outdoors, prune it. For each branch, except for leaving 2-3 buds at the base, cut off all the upper part. Pruning can promote new branches, make growth more vigorous, and also make the plant shape more attractive. After pruning, appropriately control water and fertilizer.

8. Pest and disease control: After moving indoors in winter, if indoor ventilation is poor and light is insufficient, it is prone to damage by aphids and scale insects. Attention should be paid to improving the ventilation and light transmission conditions of the indoor environment and combining this with chemical control. When there are a small number of scale insects, they can be gently brushed off with a hairbrush. The main pests of mulberry leaf peony are aphids, scale insects, cottony cushion scale, and mites (commonly known as red spider mites). These pests are all piercing-sucking pests. That is, they pierce the leaf surface or epidermis of the plant with their mouthparts and suck the plant's sap. The leaves of the damaged plant lose their green color, growth becomes weak, and ornamental value is reduced. After aphid and mite damage occurs, pesticides such as yaman sha, yaman jing, and manchong qing can be diluted a certain number of times and sprayed on the leaf surface to kill them, once a week; generally 2-3 times can basically wipe them out. Scale insects and cottony cushion scale can harm leaves and epidermis. Generally, imidacloprid-type pesticides or their improved agents can be diluted a certain number of times and sprayed on the affected parts to kill them. If the damage is severe, it can be done once every 10 days, and 3 times can basically wipe them out.

What causes the leaves of mulberry leaf peony to turn yellow? What should be done?

1. Yellow leaves caused by too low temperature

Mulberry leaf peony is a strongly sun-loving plant. Sunlight must be sufficient, and the temperature must not be too low. If it is exposed to cold in winter, it is easily frostbitten, and the leaves turn yellow and fall off.

Solution: If it is potted, it can be moved indoors. If the room temperature is also very low, then a plastic film can be placed over the pot. Be careful to expose it to as much sun as possible, and keep the potting soil on the drier side, so as to ensure it is not damaged by freezing. If it is cultivated outdoors in open ground, transparent plastic film can also be put over it, or other insulation measures can be taken.

2. Yellowing leaves caused by sudden environmental changes

For example, after winter, if you are in a hurry to move mulberry leaf peony outdoors and place it in a place much warmer than indoors, plus sun exposure and so on, it will be unable to adapt to the sudden environmental conditions and drop its leaves.

Solution: Conditions such as temperature and light where mulberry leaf peony is placed must not change too much; there should be a transition, and it can be moved from indoors to outdoors in warm spring or early summer.

3. Yellow leaves caused by improper watering

Yellowing leaves of mulberry leaf peony may also be caused by improper watering. Water accumulation or excessive dryness can both cause the leaves to turn yellow or even fall off.

Solution: If the potting soil is too wet, let the potting soil dry out before watering again, because it likes slightly higher air humidity, not moisture in the potting soil; if it is too dry, water promptly, and be careful to grasp the amount and frequency of watering.

4. Yellow leaves caused by alkaline soil

For mulberry leaf peony, choosing slightly acidic loam of pH 6.5 to pH 7 is best and most favorable for its growth. If the potting soil becomes alkaline, it will also cause its leaves to turn yellow or even fall off.

Solution: Change the potting soil, replacing compacted or alkalized soil with acidic soil. When watering in the north, pay attention to regularly applying an acidic diluted solution to prevent the potting soil from becoming alkaline.

5. Insufficient light or poor ventilation conditions can also cause leaves to turn yellow

Mulberry leaf peony is a sun-loving plant, and daily sunlight must not be less than 8 hours, otherwise it is prone to yellow leaves. If ventilation conditions are poor, that can also easily cause leaves to turn yellow.

Solution: Simply plant or place it in an environment with sufficient sunlight and good ventilation conditions.

[Tips] If the leaf surface of potted mulberry leaf peony is not sprayed and cleaned for a long time, then dust accumulation will hinder leaf photosynthesis, and this situation will also cause its leaves to turn yellow and drop. Be sure to pay more attention in daily care. In addition, remember to prune in spring; leaving thick, strong branches can concentrate nutrients more, and the flowers will bloom more vigorously in summer and autumn.

Mulberry leaf peony is a flower that blooms in summer. Many flower lovers do not understand how to care for it when cultivating it, resulting in bud drop during the flowering period. How should this situation be handled, and what are the methods to make mulberry leaf peony bloom more? Below, the editor will introduce in detail the methods to make mulberry leaf peony bloom more. How can mulberry leaf peony be made to bloom more?