How to propagate the Black Diamond rubber tree
Summary: The topic of how to propagate the Black Diamond rubber tree and the timing and methods of rubber tree propagation, which will definitely help you. Let's learn about it together!
The Black Diamond rubber tree, also known as the Indian rubber tree, is native to India and Malaysia and is now cultivated in various parts of China. It is a common ornamental tree and street tree in gardens and is very suitable for indoor decoration. Small and medium-sized plants are often used to beautify living rooms and studies, while medium and large-sized plants are suitable for placement on both sides of the entrance of large buildings and in the central atrium. Let's take a look at how to care for the Black Diamond rubber tree!
Growth habits of the Black Diamond rubber tree
The Black Diamond rubber tree prefers a high temperature, humid, and sunny environment, with a suitable growth temperature of 20-25°C. It dislikes direct sunlight and can tolerate shade but not cold, with a safe winter temperature of 5°C. It is tolerant of dry air. It dislikes clay soil and is not resistant to infertility and drought, preferring loose, fertile, and well-drained slightly acidic soil.
Propagation methods of the Black Diamond rubber tree
1. Cutting method: The cutting time is at the end of spring and the beginning of summer, which can be combined with pruning. The cuttings are usually selected from one-year-old semi-woody central branches and should be promptly sealed with glue clay or wood ash. The length of the cutting should retain three buds, cut off the lower leaf, and bind the upper two leaves together with fine plastic绳. Then, plant them in a cutting bed with sandy soil or frog stone as the base. After planting, maintain a high humidity in the cutting bed without waterlogging, with a suitable temperature of 18-25°C. Regularly sprinkle water on the ground to increase humidity and ensure shading and ventilation. Roots can form in about 2-3 weeks.
2. Layering method: Select two-year-old branches of appropriate size, well-developed, and full of tissue. Make a mild circular incision about 1 centimeter wide at the intended soil wrapping site and apply 30-50ppm of naphthalene acetic acid solution. Then wrap the girdled area with wet soil, moss mixture, or well-hydrated vermiculite, and wrap it with plastic film, tying it tightly at the bottom and leaving a hole at the top for ventilation and watering. Pay attention to maintenance, with layering in June and rooting in July-August. After rooting, the plant can be cut for potting.
Black Diamond rubber tree cultivation methods
1. Rational fertilization: Fertilization of the Black Diamond rubber tree should focus on nitrogen fertilizer, supplemented with a small amount of phosphorus and potassium fertilizer. You can use well-fermented soybean water or soybean cake water diluted for root irrigation, with a general concentration of 20%. You can also use inorganic fertilizers such as urea, but it should be applied less frequently and more frequently, avoiding concentrated fertilization to prevent root burning.
2. Soil configuration: When potting the Black Diamond rubber tree, it is suitable to use one part of decomposed leaf soil, one part of garden soil, and one part of river sand, with a small amount of base fertilizer mixed into the growing soil. It grows rapidly in a hot and humid environment, producing a new leaf every 5-10 days, during which time it is necessary to ensure sufficient fertilizer and water.
3. Light management: The Black Diamond rubber tree enjoys strong sunlight and should be grown in the sun from spring to autumn. In winter, it should also be placed in a brighter location. However, it can also tolerate shade and grows well under low indoor lighting.
4. Temperature control: The suitable growth temperature for the Black Diamond rubber tree is between 20-30°C, with the most vigorous growth at 25-30°C. Below 10°C, growth is poor, and below 0°C, it is prone to frost damage. If the Black Diamond rubber tree indoors is exposed to cold winds, it will show yellowing and leaf dropping.
5. Timely watering: The Black Diamond rubber tree likes water but does not tolerate waterlogging. If waterlogging occurs, the roots will not get oxygen, leading to yellowing and leaf dropping. Watering should follow the "dry and wet" principle and not be too frequent. In winter, it is best to keep it indoors, watering once a week, while in summer, watering should be based on the weather and soil moisture.
6. Reasonable pruning: To ensure symmetrical growth and a good plant shape, the plant should be pinched when it reaches a height of 50-80 centimeters to promote the growth of lateral branches. After the lateral branches grow, select 3-5 branches, and prune the lateral branches once a year. After 2-3 years, you can get a large plant with a complete and full shape.
Pest control
① Leaf spot disease: If the Black Diamond rubber tree has leaf spot disease, it can be treated with a fungicide spray of carbendazim or benomyl at 800 times concentration, once a week, for 2-3 consecutive weeks to basically cure the disease.
② Anthracnose: Anthracnose is not easily detected in the early stages, starting as small brown spots on the leaves. If not treated promptly, it will quickly spread and lose its ornamental value. If detected, immediately spray the leaves with methylethylthiazole at 400 times concentration, once a week, for 3 consecutive weeks, which can generally cure the disease.
③ Root rot disease: Root rot disease is usually caused by infection with Rhizoctonia or Pythium in the soil or due to physiological diseases. Bacterial infections can be treated with fungicides such as benomyl, dodine, or quintozene at 500 times concentration for root irrigation. Physiological diseases are mostly caused by overly heavy clay soil, excessive and frequent watering, and the roots being unable to breathe, so consider changing to well-draining soil.
The above content about how to propagate the Black Diamond rubber tree and the timing and methods of rubber tree propagation is hoped to be helpful to you!