The octagonal tree is an economic plant of the Illicaceae family. It grows in humid and warm valleys in the subtropics and is distributed in Fujian, Guangdong, Guangxi, Guizhou, and Yunnan. In other places, the fruits and seeds can be used as seasonings, medicines, and spices for making toothpaste, soap, perfume, and cosmetics. The economic value is very high. Let’s take a look at the planting conditions of octagonal trees!

Temperature conditions

The anise tree is a subtropical tree species that likes warmth. It requires a suitable growth temperature range of 20-30℃, and the coldest daily average temperature is 10 degrees, the hottest average temperature is 25-28 degrees, the annual accumulated temperature is above 6000 degrees, and the frost-free period is more than 315 days. The short-term light frost period has no major impact on plant growth. Places where it snows in winter have a great impact on the growth of octagonal trees. In February, the anise tree begins to sprout when the temperature reaches 10 degrees. In March, when the temperature rises to 13-15 degrees, it enters the leaf unfolding period. In July, when the accumulated temperature reaches 3200 degrees, flower buds form, and flowering begins when the temperature is above 3400 degrees.

Humidity conditions

Star anise trees like to grow in humid mountainous climate conditions, requiring annual rainfall of 1200-2000 mm and even distribution. The relative humidity of the air is above 80%.

Light conditions

The octagonal tree is a shade-tolerant plant. Seedlings like to grow in shaded environmental conditions and avoid long sunlight. %-80% conditions are beneficial to the growth of seedlings. When the shade degree is below 30%, the seedlings will not grow well, and the leaves will turn yellow or even die. It takes a year for seedlings to grow under shade conditions. As the plants grow, their requirements for sunlight gradually increase. The tree needs sufficient sunlight to bloom and bear fruit, but avoids strong direct sunlight, so it is suitable to grow in valleys and hillsides with shorter sunshine hours and more closed forests in mountainous areas.

Wind conditions

Wind has a great impact on the growth, flowering and fruiting of anise. Because the wood is soft, the branches are fragile, the main root does not grow deeply, and the lateral roots Most of them are distributed within 50 centimeters of the topsoil, so they are not strong in wind resistance and are easily blown down by strong winds. Moreover, strong winds are very detrimental to the flowering and fruiting of octagonal trees, because after the octagonal trees enter the fruiting period, they are hung on their branches all year round. The second half of the year is also the flowering period. Once strong winds occur, it is easy to cause a large number of fallen flowers and fruits, resulting in reduced yields. When selecting afforestation sites, they should be arranged at the foot of wind-sheltered mountains and lower parts of hillsides as much as possible. Avoid planting trees in windy areas.

Topographic conditions

Topography has a great influence on the growth of anise, because topography directly affects the length of sunshine, temperature, humidity, rainfall, and soil. Conditions such as these are closely related to the growth of octagonal anise. From the perspective of the large terrain, low mountains with undulating hills are suitable for the growth of octagonal anise. From the perspective of small terrain, good drainage is required, and it is suitable only on mountains with a slope of 15-25 degrees. For growth, stagnant water in low-lying areas, high groundwater levels, and poor drainage are not suitable for the growth of octagonal trees. It grows well in hilly and low mountain areas with an altitude of 300-700 meters.

Soil conditions

The content of nutrients in the soil will directly affect the yield and quality of anise. It is rich in phosphorus, aluminum, zinc, sulfur The anise tree grown in soil containing elements such as , manganese, potassium and other elements has high yield and excellent quality, so it is suitable to grow in brick red soil with loose texture, deep soil layer, rich humus, fertile and moist brick red soil.

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