Culture methods of Australian fir

Australian fir, also known as Cryptomeria fortunei, Norfolk Cryptomeria, Cunninghamia lanceolata, etc., is an evergreen tree of the genus Cunninghamia lanceolata, native to the southeast coastal area of Oceania, and is now introduced and cultivated in Guangdong and other provinces. Some cities in northern China began to introduce Australian fir bonsai in 2002, growing well, let's take a look at the breeding methods of Australian fir!

Growth habits of Cryptomeria fortunei

Australian fir potted trees are generally young trees, less than 2 meters high, crown steeple, dark green, stem erect, lateral branches whorled, horizontal extension, branchlets distichous, horizontal extension or slightly drooping, leaves of two types. The cones are nearly round. Like warm, humid environment, grow well in sunny places, have a certain shade tolerance, but to avoid strong light exposure in summer, not resistant to cold and drought, suitable for good drainage of slightly acidic sandy loam rich in humus.

Propagation methods of Cryptomeria fortunei

1. Sowing: the seedlings cultivated by sowing Australian fir 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: if the main shaft or overgrown branches are selected as cuttings, the crown shape of the plant is not correct and it can only grow laterally 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.

Culture methods of 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 stagnant water in the basin should be avoided. When drying at high temperature, water should be sprayed 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: Australian fir has a long growing season and can grow throughout the year 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.

Matters needing attention in the culture of Australian fir

1. Australian fir is growing in summer and autumn. Potted plants can not only be placed in the semi-shade, but also in the ventilated place with light in the window. the hot sun exposure above 35 ℃ is avoided, and it is not suitable to put in shaded places without light for a long time. In this way, the branches and leaves will be withered 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. Under normal circumstances, Australian fir does not need to be pruned 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.