A Detailed Guide to the Planting Methods and Key Technical Points for the Night-Blooming Magnolia
The night-blooming magnolia, also known as the night-fragrant magnolia, originates from southern China. It prefers a warm, humid, semi-shaded to semi-sunny environment, tolerates shade, and fears scorching sun exposure. It requires fertile, loose, well-drained, slightly acidic soil, and the winter temperature should not fall below 5°C. It is an evergreen shrub, 1-2 m tall.
Growing Environment
The night-blooming magnolia originates from China. It prefers a warm, humid, sunny environment, has strong adaptability to climate and soil, tolerates shade, and loves fertilizer. It likes to grow in a warm, humid, semi-shaded to semi-sunny environment. It is suited to well-drained, fertile, slightly acidic sandy soil, and while it dislikes calcareous soil, it also tolerates poor, thin soil and arid climates. The flowers open for only a short time, each blooming for just 1-2 days, often opening in the early morning and closing at night, hence the name night-blooming magnolia. The fragrance is subtle and becomes even stronger at night. The suitable temperature during the flowering period is 22-25°C; below 20°C, flowering is delayed.
Propagation
Layering and grafting are mainly used for propagation. For layering, use the air-layering method in spring: select a strong one- or two-year-old branch from the mother plant and girdle it in a ring 1 cm wide, with the depth kept just short of damaging the xylem. Wrap it with plastic film, fill in leaf mold, and tie it tightly, binding the lower part tightly and keeping the middle part appropriately snug. The wrapping soil should be kept moist at ordinary times, generally with a relative humidity of about 80 percent being suitable. Roots form in 80-90 days, and in autumn it is cut off and potted. For grafting, the approach grafting method is commonly used, with a one-year-old potted Michelia champaca as the rootstock; in the plum rain season, select a scion from the mother plant, support the potted rootstock with a bamboo pole, and after about 2-3 months cut it off from below the scion to complete the process.
The night-blooming magnolia prefers warmth and humidity, likes semi-shade, and dislikes strong light exposure. It grows well in fertile, loose, slightly acidic soil; for potting, mountain soil is best, and calcareous soil must be avoided for cultivation. The soil must be acidic, with a pH of 5.5 to 8.5. For home cultivation, you can also use 6 parts vegetable garden soil and 4 parts river sand, mixed with half a spoonful of black alum. After the night-blooming magnolia is brought outdoors in mid-April, place it in a spot with diffused light for care, with a light transmission rate of 30 to 40 percent being suitable. In spring, water once every 2 to 3 days; northern springs are dry and can easily cause yellowing leaves, so water with alum fertilizer solution three or four times in succession every two or three days. In summer, it should be kept in semi-shade, with frequent spraying to increase air humidity. After the beginning of autumn, water less. Gradually increase light so the plant becomes sturdy. In autumn, prune and shape the dead branches and misplaced branches. In winter, bring it indoors and place it where sunlight does not shine directly; keep it between 10 and 12°C during the day, and no lower than 5°C at night and no higher than 10°C, so as not to harm winter dormancy and affect flowering the following year. In winter, just keep the potting soil slightly moist. During the growing period, apply a top dressing of decomposed cake fertilizer liquid about every 15 days. Before the flowering period, stop applying nitrogen fertilizer and apply more phosphorus and potassium fertilizer to promote larger flowers and a richer fragrance. When brought indoors for care in early winter, no fertilization is needed.