How to breed magnolia in winter
As a traditional and famous flower in China, winter maintenance of Magnolia japonica directly affects the quality of flowering in the coming year. This paper systematically analyzes key technologies such as temperature control, light management, and water control, and combines the differences between potted plants and ground planting to help you cultivate a lush magnolia landscape. Refined temperature management potted overwintering strategy When the temperature drops to 10 ° C (about late October), it is necessary to move the white magnolia into a bright place indoors and maintain a dormant environment of 5-10 ° C. Special attention should be paid to avoid direct blowing of air conditioning. Double-layer glass window + gauze curtain combination is adopted to ensure lighting and isolation of cold radiation. The "three-layer wrapping method" is adopted in the northern part of the field planting cold-proof system: the inner layer of non-woven fabric + the middle layer of straw mat + the outer layer of waterproof film, and the height of trunk wrapping should reach 1.5 meters. Combined with root cultivation (30cm thick) and covering pine needles (5-8cm), the ground temperature can be increased by 3-5℃. Lighting optimization scheme scientific placement position indoor potted plants should be placed south bay window, daily guarantee 4 hours of direct light. Turn the pot 45 degrees every week to avoid off-crown growth. Wipe leaves in time after rainy and snowy weather to increase photosynthetic efficiency by 5-8%. Manual filling light techniques For more than 3 consecutive days of rainy weather, it is recommended to use full-spectrum plant lamps (PPFD value 200-300μmol/m²/s), filling light for 2 hours a day, and the lamp is best to be 80-100cm away from the crown. The principle of intelligent moisture control and precise watering adopts the "bamboo stick detection method": insert a 30-cm bamboo stick into the pot soil, pull it out without moisture before watering. The difference between the water temperature and the ambient temperature should be ≤3 ° C to avoid cold water stimulating the root system. Pour thoroughly at 10 a.m. on sunny days, and drain the accumulated water within 2 hours. Humidity balance plan When the indoor humidity is below 40%, use an ultrasonic humidifier to maintain the humidity of 50-60%. Clean the leaves with 25 ° C warm water spray every week, and avoid the period from 11:00 to 14:00 to prevent frostbite. Nutritional scientific management and fertilizer stop time node: Bone meal (200g/plant) was applied as base fertilizer before frost fell in October, and fertilizer was completely stopped from November to February of the following year. When sprouting in early March, the plants were awakened with 5% decomposed cake fertilizer water, and iron chelate foliar fertilizer was used to prevent yellowing. Root protection measures Use EM bacterial solution (1:500) to irrigate roots every month in winter to enhance cold resistance. Perlite (15%) can be added to potted plants to improve soil and improve air permeability to prevent root rot.
Through a three-pronged approach of precise temperature control, light energy utilization, and water regulation, and scientific nutritional management, the survival rate of Magnolia japonica can reach more than 95% through winter. It is recommended to conduct branch elasticity testing every month and adjust the maintenance plan in time to accumulate energy for spring bloom.