How to grow potted Australian fir?

Australian fir, also known as Cunninghamia lanceolata, Norfolk Cryptomeria fortunei, Cunninghamia lanceolata, etc., are evergreen trees of the genus Cunninghamia lanceolata of Cunninghamia lanceolata, generally potted trees with a height of less than 2 meters, crown steeple, dark green, stem erect, lateral branches whorled, horizontal extension, branchlets alternate, horizontal extension or slightly drooping. Now let's take a look at how to grow potted Australian cedar.

Growth habits of Cryptomeria fortunei

Australian fir is native to the southeast coastal areas of Oceania, such as northern Australia, Guangdong and other provinces are introduced and cultivated. Some cities in northern China began to introduce Australian fir bonsai in 2002 and are growing well. Like warm, humid environment, grow well in sunny places, have a certain degree of shade tolerance, but to avoid summer strong light exposure. It is not resistant to cold and drought and is suitable for slightly acidic sandy loam with good drainage and rich humus.

Propagation methods of Cryptomeria fortunei

1. Sowing: the seedlings cultivated by sowing are strong and vigorous, so they are suitable for mass propagation. Generally from July to August, the newly collected seeds will first break the seed coat in order to promote germination, otherwise leaving the soil for a long time will easily cause the seeds to rot, and then sow the treated seeds in the sand bed, covering about 1.5 cm of fine sand. Under the condition of 25-28 ℃ and a certain humidity, it can germinate after about 2-3 weeks, and it can be planted immediately after germination.

2. Cutting: when cutting, it is easy to cause the incorrect crown shape of the plant if you choose the main shaft or overgrown branches as cuttings, which can only grow horizontally and affect the ornamental value. Cut the first 2-3 nodes of robust branches that are easy to root as cuttings, remove some leaves, soak them in clean water overnight, and then insert them into a sand bed based on coarse sand or vermiculite. Keeping the temperature of 20-25 ℃ and high air humidity, it can take root after about 3 months.

How to grow potted Australian fir?

1. Soil: Australian fir is suitable for slightly acidic sandy loam with good drainage and rich humus. When potted, it is better to use the mixture of garden soil, rotten leaf soil and peat moss.

2. Watering: Australian fir should be watered more from spring to autumn, but avoid stagnant water in the basin. When drying at high temperature, spray water on the basin plant and the ground near it to cool and humidify. Water it in time. Don't wait until the soil is dry before watering. Since the end of autumn, watering is gradually reduced to enhance its cold resistance.

3. Lighting: Australian fir likes diffuse light and should be placed in a bright place in the shed. If it is kept in the dark for a long time, it should be moved to the sun every few weeks to make the thick green leaves maintain a beautiful color.

4. Temperature: the Australian fir can grow all year long except when the summer temperature exceeds 32 ℃.

5. Fertilization: the fertilizer should be applied every 2 weeks in the growing season of Australian fir, and the compound fertilizer containing nitrogen and potassium is suitable. If the supply of fertilizer is insufficient, the branches and leaves are easy to turn yellow.

6, diseases and insect pests: Australian fir diseases and insect pests are very few, in indoor maintenance, most of the shell insect harm, can be sprayed with methophos, chlorpyrifos machine EC, Guoguang scale must die and other control, the effect is good.

The meaning of Australian fir

1, summer and autumn is the growing period of Australian fir, potted plants can not only be placed in the semi-shade, but also can be placed in the window with light in the ventilated place, avoid exposure to the hot sun above 35 ℃ Celsius, and should not be put in shaded places without light for a long time, which will cause branches and leaves to wither and yellow or grow too long, affecting the ornamental value.

2. In order to avoid tilting the trunk to one side during the growth of Australian fir, it is appropriate to turn the pot once a half month so that the plant can receive light evenly. In addition, the trunk of young trees is fragile and easy to bend, so it is appropriate to set up pillars to fix the trunk from the time of young trees. In order to prevent the plant from growing too tall, the pot should be changed every 2-3 years after the spring is warm. At ordinary times, we should pay attention to protect the lateral branches so as not to be damaged and affect the plant shape.

3. Australian fir does not need to be pruned under normal circumstances to allow it to grow naturally. The suitable temperature for growth is 10-25 ℃, and the overwintering temperature is above 5 ℃. Overwintering season can give a certain amount of light, basin soil can not be too dry, sunny weather should also spray water to increase humidity.