Can osmanthus trees be planted outdoors in the north?
As one of the top ten famous traditional flowers in China, the cultivation of osmanthus trees in the northern region has always attracted much attention. With the development of gardening technology, through scientific maintenance methods, northern flower lovers can also enjoy the beautiful scenery of the fragrance of golden osmanthus in the courtyard. Based on practical cultivation experience, this paper will systematically analyze the feasibility and key points of winter maintenance of osmanthus osmanthus in northern China. Temperature adaptability management, the core points of osmanthus tree cultivation in the north, has strong cold tolerance, and adult plants can tolerate low temperatures of-13℃. In the Yellow River Basin and North China (Beijing, Hebei, Shandong and other places), locally planted plants combined with appropriate protection can naturally winter. It is recommended to pile a 30-cm-high mound on the foundation before the cold current comes, and wrap the trunk with straw rope or insulation cotton. Special attention should be paid to protecting the grafting parts. Light and direction selection Select planting on the south side of the courtyard with sunny and leeward to ensure direct light for more than 6 hours a day in winter. In new residential areas, attention should be paid to avoiding the windswept area formed by buildings. If the distance between east-west buildings is small, bamboo curtains can be used to block the wind on the side. Soil and water control Northern cultivation requires special attention to soil improvement: 1. The planting hole has a depth of 80- 100 cm and a diameter of 1.5 meter2. Lay a 20cm gravel layer on the bottom layer 3. Backfill soil is prepared according to the ratio of humus soil: garden soil: river sand =3:5:2. Winter watering follows the "three-look" principle: look at the temperature (>3℃), look at the moisture (2cm of topsoil is dry), and look at the time (noon 11-14 o'clock), the amount of watering each time is controlled at 1/3 of that in summer. Nutrient management strategies for key measures for winter winter of osmanthus in northern China will stop applying nitrogen fertilizer in late September, and increase phosphorus and potassium fertilizer application to enhance cold resistance. It is recommended to use decomposed bone meal (200g/plant) with potassium sulfate (50g/plant), and spray 0.3% potassium dihydrogen phosphate solution on the leaves 15 days before the cold wave. Wind-proof and anti-freezing skills Set up a 2-meter-high wind-proof barrier northwest of the plant, and the material can be selected from straw mats or colorful cloth. The "bagging method" can be used in extreme low temperature weather: wrap the crown with a non-woven insulation bag, and pay attention to breathe for 2 hours at noon on sunny days. The cultivation practice of osmanthus osmanthus in the north has verified the successful case of the Beijing Botanical Garden. The selection of cold-resistant varieties (such as 'Wanyingui') and the above maintenance measures can lead to the overwintering survival rate of more than 92%. The key is to grasp three time nodes: complete soil cultivation in early November, complete wind prevention settings in mid-December, and gradually remove cold-proof objects at the end of February.
Through scientific regional adaptive cultivation, the northern courtyard can also cultivate healthy osmanthus trees with a crown width of more than 3 meters. It is recommended that novices start with 3-year-old grafted seedlings and try transplanting large seedlings after accumulating experience. As long as you master the three elements of temperature, light, water and soil, you will be able to harvest fragrance throughout the courtyard during the golden autumn season.