Culture method of Pinus elliottii

Five-needle pine gets its name because of its clump of leaves, also known as Japanese five-needle pine, Japanese five-needle pine and so on. it is an evergreen coniferous tree of Pinus pinaceae, with short plants, slow growth, dense leaves, short branches, elegant posture and beautiful tree shape. it is considered to be an excellent tree species for making bonsai. Let's take a look at the culture method of Pinus elliottii.

Growth habits of Pinus elliottii

Five-needle pine likes the warm and humid environment, light-loving tree species, high light requirements, no stagnant water in the planted soil, good drainage and air permeability, and poor growth in shady and wet places. Although it has strong resistance to sea breeze, it is not suitable for sand growth. Organic fertilizer is the best way to apply fertilizer.

Cutting Propagation of Pinus elliottii

1. Soil requirements: the soil insertion of five needles requires good air permeability and water retention. 70% yellow soil, 20% fine river sand and 10% grain bran ash can be used after sieving and mixing. Soil insertion should be strictly disinfected, and a small amount of soil insertion can be disinfected at high temperature, such as pan stir-frying and boiling disinfection. A large number of soil insertion generally use drug sterilization methods, such as carbendazim disinfection method, formalin disinfection method, Dysen zinc disinfection method and so on.

2. Cutting time: it is suitable for cuttings to select twigs from May to August, and the specific cutting time of each tree species should be determined according to the Lignification degree of twigs, reaching semi-Lignification. Sturdy, full and exuberant semi-lignified twigs should be selected as cuttings on young mother trees with strong growth and no diseases and insect pests. In order to prevent the branches from losing water, it is best to cut ears in the early morning, that is, hormone treatment. The length of cuttings should be 4 to 10 cm. The basal leaves should be cut off, the upper leaves should be retained, and the lower incision should be close to the axillary bud.

3. Hormone treatment: before cutting, tender branches were treated with ABT rooting powder, indoleacetic acid, naphthylacetic acid and other plant hormones, which can greatly improve the survival rate of cuttings. The most commonly used and effective hormone in production is green plant growth regulator. The method used is to prepare GGR into 50ppm solution, and then soak the base of cuttings in the solution for 3 to 24 hours.

4. Environmental control: providing appropriate environmental humidity and rooting temperature is the key to the success or failure of five-needle pine softwood cutting. the softwood cuttings of five-needle pine require air relative humidity between 80% and 95%, temperature between 18 ℃ and 28 ℃, and suitable light conditions.

5. After-insertion management: after the five-needle pine cuttings take root, the light transmission intensity and ventilation time should be gradually increased to make it gradually adapt to the external environment. After the loose cuttings survive, they should be transplanted in time and can be moved to the nursery or nutrition bag. After transplanting, the management and protection should also be strengthened, shading and watering should be taken at the initial stage of transplanting, and the work of removing sprouting, wiping buds, loosening soil and preventing diseases and insect pests should be done well after seedling.

Culture method of Pinus elliottii

1. Soil: five-needle pine is suitable to grow in loose, fertile and slightly acidic soil with good drainage. If the needle is too alkaline, the needles will yellowing and fall off, so it is better to use natural mountain soil in pot soil. According to the proportion of basin soil, 3 parts of rotten leaf soil, 5 parts of garden soil, 1 part of compost and 1 part of sandy soil were mixed into nutrient soil. Generally, the basin should be changed every 2-3 years, and the time for changing the basin should be in February-March or September-October.

2. Illumination: five-needle pine is a positive tree species, and it should be kept in a sunny place in spring, autumn and winter. The needles are short and strong, and the leaves are green. On the contrary, the needles are thin and easy to turn yellow. But in the hot summer, the hot sun should be avoided around noon so as not to cause the needles to scorch.

3. Watering: spring and autumn are the growing season of five-needle pine. It is necessary to keep the basin soil moist and promote the growth of branches and leaves. The slow growth of five-needle pine in summer has entered a dormant period, but the water evaporation is large, watering once every morning and spraying water on the leaves once in the evening. Control watering in winter and maintain its lowest temperature. It is usually necessary to adhere to the principle of seeing dry and wet, and watering thoroughly.

4. Fertilization: five-needle pine does not require high fertility, fertilization should not be too much and too thick, too much fertilization will make shoots grow, needles become longer, and hinder ornamental value. Generally speaking, only two fertilizers are applied during the growth period of spring and autumn, and organic liquid fertilizer is applied before germination or after thick leaves in spring. Fertilization can be thickened appropriately in autumn to promote robust growth. Stop fertilizing after October.

5. Pruning: the five-needle pine has a good posture and is a tree species with high ornamental value. it is not only suitable for garden decoration, but also an important tree species for potted plants or bonsai. In order to maintain a good tree posture, control the growth of branches and leaves, and achieve the shape of short, dense and vigorous branches and leaves, it must be trimmed frequently. When the buds of the five-needle pine sprout and grow, the buds are removed, which can avoid sprouting and growing branches, and make the lateral buds grow evenly and healthily, so as to reduce nutrient consumption and achieve a vigorous and graceful tree posture.

Points for attention in culture of Pinus elliottii

1. Moderate light: five-needle pine is a neutral plant, which can grow in sunny or shady places, but in sunny and well-ventilated places, needles grow green and strong, and needles grow thin and yellow in places with insufficient light and hot weather. It is best to give five needles pine more than 5-6 hours of light every day, and maintain good ventilation conditions. But in the midsummer hot noon, in order to prevent the needles from getting too much sun caused by scorched leaves, shading and other measures can be taken, other times can allow them to fully accept the sun.

2. Control watering: the watering of five-needle pine bonsai should be moderate, and the flower proverb "dry pine and wet cypress" shows that five-needle pine should be dry. The summer temperature is high, and the basin soil is easy to dry. Generally, the basin soil is watered once in the morning and once in the morning, and in the evening it depends on the dry and wet condition of the basin soil. In case of showers, it is necessary to cover the rain in time to avoid the loss of nutrients in the soil.

3. Regular fertilization: fertilization is the key to raising five-needle pine, which can be combined with watering. The weather is hot from July to August, so 10% thin fertilizer and water should be applied once every half month. In addition, we should pay attention to the five-needle pine shade after fertilization, do not let the sun exposure.

4. It is not suitable to reshape: for the modeled five-needle pine bonsai, in order to maintain its inherent styling posture, it is necessary to trim it every year. However, the pruning of five-needle pine should be carried out in its winter dormancy period, and must not be trimmed in the midsummer season, otherwise a large amount of pine resin will flow out of the wound, affecting the growth of five-needle pine.