What are the cultivation methods and precautions for Podocarpus nagi

Podocarpus nagi is a national second-class protected plant in China, also known as coconut tree, luohan chai, etc. It is a tree of the genus Podocarpus in the family Podocarpaceae. Its branches and leaves are green and glossy, the crown is dense, and the tree shape is beautiful. It has been widely used in recent years as an excellent landscape tree for greening courtyards, residential communities, streets, and other areas. Now let us take a look at the cultivation methods and precautions for Podocarpus nagi!

The cultivation value of Podocarpus nagi

1. Ornamental value: Podocarpus nagi has green and glossy branches and leaves, a dense crown, and a beautiful tree shape. It is a good shade tree in the south and a street tree in gardens. It is also an excellent tree species for greening the four sides of urban and rural areas. It can be planted in patches in parks, courtyards, residential communities, streets, and other areas, and can also be mixed with other evergreen and deciduous tree species.

2. Home decoration: Podocarpus nagi can be mixed with other coniferous and broad-leaved tree species in warm places in parks and green spaces. It can also be planted in opposite pairs or rows in slightly bright and wind-sheltered places near tall buildings, and is also suitable for potted viewing. The branches and leaves of Podocarpus nagi are green and glossy, the crown is dense, the tree shape is beautiful, the leaves are lush and the shade is dense, and it is easy to cultivate. It is very suitable for indoor cultivation to decorate the home.

3. Economic value: The sapwood of Podocarpus nagi is light yellow-white, the heartwood is dark in color, the grain is straight, the structure is fine, the hardness is moderate, the specific gravity is 0.47-0.53, it is easy to process, durable, and is an excellent material for construction, shipbuilding, furniture, utensils, and crafts. The leaves of Podocarpus nagi are shaped like bamboo, and the crown is beautiful and dense. It is a beautiful ornamental tree species and woody oil tree species. The seeds contain oil and can be eaten.

4. Medicinal value: Podocarpus nagi not only has unique ornamental value, but also has certain medicinal value. Podocarpus nagi has the effects of stopping bleeding and setting bones. Podocarpus nagi uses its leaves as medicine. It can be collected throughout the year, washed, used fresh or dried in the sun. It has the effects of stopping bleeding and setting bones. For external use, an appropriate amount of fresh product can be pounded and applied, or dried product can be ground into powder and mixed for application to treat bleeding, fractures, etc.

Propagation methods of Podocarpus nagi

1. Sowing: Podocarpus nagi seeds can be sown in a greenhouse as soon as they are collected, or sown outdoors in spring. After sowing, cover with soil 2-3 cm thick, and cover with straw or weeds for shading. Seeds begin to germinate after 20 days. Then gradually remove the covering, and seedlings emerge completely in 30 to 50 days. Because the root system of seedlings is not fully developed, waterlogging, heavy rain, high temperature, and exposure to the sun can all cause their death, so daily management must be especially careful.

2. Cuttings: Generally carried out in March, and also possible in mid-September. Cut current-year or one-year-old tender branches as cuttings, and cut off some leaves to reduce water evaporation and ensure survival. Rooting powder and other agents can also be used for treatment to promote rooting. Insert into coarse sand, vermiculite, or other media with good drainage and aeration. After insertion, water frequently and spray frequently to keep the medium and air moist, and avoid exposure to strong sunlight. The survival rate is quite high.

3. Layering: Podocarpus nagi mostly uses the air layering method. In the growing season, select robust and full one-year-old branches, make a girdle at a suitable position, then wrap soil around the wound, and use a plastic bag to tightly wrap the soil to keep it moist. After rooting, cut it off and plant it in a pot.

Cultivation methods of Podocarpus nagi

1. Soil: Podocarpus nagi has strict soil requirements. It is more suitable in deep, loose, moist, humus-rich, acidic sandy loam to light clay developed from parent rocks such as sandstone shale, granite, and metamorphic rock.

2. Water: Podocarpus nagi grows well in areas with an average rainfall of 1200-1800 mm. If rainfall is less than 800 mm, growth is poor. It likes moist areas but not waterlogged ones.

3. Light: Podocarpus nagi is a shade-tolerant tree species. Its growth speed on shady slopes is 5-6 times faster than on sunny slopes. On sunny slopes with strong sunlight, the root collar may suffer sunscald or die.

4. Temperature: The most suitable annual average temperature for Podocarpus nagi is 18-26°C. Its cold resistance is weak, and the extreme minimum temperature is -7°C, otherwise it is prone to low-temperature damage.

5. Fertilization: Podocarpus nagi is tolerant of poor soil. When fertilizing, it is best to use acidic fertilizer, and it is best to apply fertilizer solution. Apply less at a time but frequently.

6. Pruning: In winter, when the plant enters dormancy or semi-dormancy, cut off weak, diseased and insect-infested, dead, and overly dense branches.

Precautions for Podocarpus nagi

1. Within 1-2 months after the seedlings of Podocarpus nagi emerge, the aboveground part grows slowly and has poor resistance to adverse external factors. In addition, Podocarpus nagi seedlings are shade-tolerant and avoid waterlogging, so heavy rain, high temperature, and exposure to the sun can cause large numbers of seedling deaths. Therefore, after the seedlings emerge, a shade shed should be built. The shading material should be sturdy and firm and should not damage the seedlings. Reed curtains are generally used, and shade nets are best.

2. The main pests and diseases of Podocarpus nagi are red spider mites, scale insects, anthracnose, and leaf spot. To control red spider mites, spray dicofol, hexythiazox, etc. To kill scale insects, spray chlorpyrifos, methidathion, etc. To treat anthracnose and leaf spot, spray carbendazim, thiophanate-methyl, propiconazole, etc.

3. When Podocarpus nagi just emerges, it is curved, first growing stems and then leaves. The emerged rhizomes are easily infected by fungi, so thiophanate-methyl and carbendazim should be sprayed alternately. During the bud and seedling stage, weeds should be removed frequently. The buds and seedlings of Podocarpus nagi are tender, so water and fertilizer management should be strengthened, and watering should be done once at regular intervals.

4. For potted Podocarpus nagi, one- or two-year-old plants can be selected. Because the plants are slender and weak, several plants are often planted in the same pot. When planting, refer to the production method of bamboo bonsai, pay attention to the staggered heights and the positions front, back, left, and right, so that the density is appropriate and it is elegant and refined. A layer of stones or moss can also be spread on the surface of the potting soil to increase ornamental value.