Black leaf Avalokitesvara is native to tropical Asia. I like warm, humid and semi overcast environment. Basin soil needs to keep a high degree of humidity to grow well. In the case of water shortage, the plant state is that the leaves are soft and drooping. As long as the plants are watered as soon as possible, they can quickly return to their original healthy appearance. It is suitable to choose rotten leaf soil or peat soil with good drainage, fertility and looseness. Black leaf Avalokitesvara is suitable for growing in medium light, and avoid strong sunlight. If it is exposed to the sun for a long time, it is likely that the leaf surface is rough, the color of the leaf is gray and white, the vein of the leaf is fuzzy, and sometimes there are burn spots on the leaf surface. The suitable temperature for the growth of black leaf Avalokitesvara is between 25 ℃ and 30 ℃, and it should not be lower than 15 ℃ in winter. Once the temperature is lower than 15 ℃, it is likely to lead to growth stagnation.
Potted black leaf Avalokitesvara generally uses a flowerpot 15-20cm high as a growth container. It is better to pad some stone bricks at the bottom of the flowerpot to increase the permeability of guanyinlian. Good drainage, fertile, loose rotten leaf soil or peat soil is the best choice.
As the black leaf Avalokitesvara likes to grow in warm and half shade, it is forbidden to expose to strong sunlight. The suitable temperature for growth is between 25 ℃ and 30 ℃, and the overwintering temperature is above 15 ℃.
Keeping the basin soil moist is one of the necessary conditions for the growth of black leaf Avalokitesvara. The air humidity should be maintained at 70% ~ 80%, which is conducive to the growth and development of leaves. At the same time of watering, remember to control the amount of water to avoid rotten roots caused by long-term water.
In the period of vigorous growth from May to September, fertilizer should be applied once every half a month. Select the thin liquid fertilizer or the compound fertilizer with low nitrogen and high phosphorus and potassium.
There are common hazards of gray mold. At the beginning of the disease, spray with 59% tobujin WP 1000 times.
Stem rot is a kind of disease which is easy to occur in high temperature and high humidity environment. When the black leaf guanyinlian appears this kind of disease, use 70% methyltobujin wettable powder 1000 times to spray.
Aphid contact spread mosaic, with 40% Omethoate emulsion 1000 times spray kill.
In addition, it has the harm of Spodoptera litura and Pieris rapae, which are killed by spraying 3000 times liquid of 10% insecticidal cream.
Black leaf Avalokitesvara has certain toxicity. Once ingested by mistake, there will be vomiting, diarrhea and other toxic symptoms. Care should be taken to prevent children or the uninformed from eating by mistake or through other channels.
The leaves of the black leaf Avalokitesvara are large and thin, with few leaves, which are easy to be damaged. Therefore, to pay more attention to the growth of leaves, the growth position of each leaf of potted plants needs to be reasonable. In the cultivation process, the arrangement direction of leaves can be adjusted properly. According to the growth situation and the preference for the shape, the leaves can be trimmed properly, so that the black leaf guanyinlian can maintain a high degree of beauty.
