How to grow white magnolia (Michelia alba)? Potted cultivation methods and precautions

White magnolia has a rich fragrance and a long blooming period, from June to October. Place a single flower in your pocket, or set a few in a room, and the fragrance can last more than ten days without fading; even after the flowers have dried and shriveled to a brownish yellow, brewing them as tea is still wonderfully fragrant. To grow white magnolia at home, you need a fairly large balcony and courtyard, as well as plenty of sunlight, because it is a sun-loving woody plant; otherwise it will not grow well.

How to grow white magnolia?

1. White magnolia is neither drought-tolerant nor moisture-tolerant. In summer and autumn the weather is hot and evaporation is fast, so water demand is high and watering must be timely. The potting soil should be kept slightly moist. Its roots are thick and fleshy, and it fears waterlogging above all, so the potting soil should be a free-draining humus soil. Do not let it get rained on during the plum rain season; if the potting soil stays wet and does not dry out for a long time, the roots will rot, causing the leaves to yellow and drop off and the plant to die, which is very hard to save. This point deserves special attention for white magnolia brought indoors to overwinter and go dormant, because large white magnolias grown in glazed ceramic tubs have non-breathable glazed walls, and at this time the plant's transpiration is also low, so the surface soil in the tub dries easily while the soil at the center is slow to dry. If you water whenever the surface looks pale, the potting soil will stay constantly wet and the plant will die. Most white magnolias that people kill die from this mistake. Therefore, in winter the potting soil should be kept slightly dry; as long as the soil at the center of the tub has not dried out, you absolutely must not water.

2. White magnolia likes fertilizer but dislikes strong fertilizer. Besides applying plenty of base fertilizer when repotting every 2-3 years, generally after the plant begins blooming, water with decomposed soybean cake water or fish waste water once every 7-10 days. Follow the principles of dilute application, frequent application, and application in the evening. Stop fertilizing after the cool autumn arrives.

3. White magnolia fears cold and loves sun, and should receive more than 10 hours of sunlight per day. Even when brought indoors to go dormant in winter, it must not be kept in shade for a long time, otherwise flowering the following year will be affected. It fears cold even more than jasmine; bring it indoors to overwinter in early November, and it cannot be taken out for normal care until mid-April of the following year.

4. White magnolia is not tolerant of pollution. Besides not growing it in pots in factory areas, home growers should also not keep it in the kitchen to overwinter, to avoid contamination from cooking fumes.

Precautions for potted white magnolia cultivation

1. White magnolia has fleshy roots and fears waterlogging above all. The potting soil must be well-drained acidic soil, and the bottom of the pot should be lined with a 3-4 cm layer of granular furnace cinder or broken tile pieces as a drainage layer.

2. Midsummer sunlight is intense, so shade it appropriately around midday, or move it under tree shade from June to August for care. During the peak growth season (May-September), apply liquid fertilizer once every 1-2 weeks, and at the same time keep the potting soil constantly moist. In summer, also frequently spray and wash the leaves and sprinkle water on the ground to keep the environment humid.

3. In winter it is best kept indoors for care, with the daytime room temperature maintained at around 12°C and the nighttime minimum no lower than 5°C. When first brought indoors, do not water too little. Around the winter solstice, white magnolia enters dormancy, so watering must be controlled, fertilization stopped, and attention paid to proper ventilation.

4. During cultivation, if yellow leaves are found, promptly spray with a 0.2% ferrous sulfate solution 2-3 times, which will gradually turn the leaves from yellow back to green. Avoid applying strong fertilizer. When repotting every 2-3 years, apply plenty of base fertilizer. After flowering, apply a dilute decomposed soybean cake water and fish waste water once every 10 days in the evening. Stop fertilizing after the weather cools in autumn. It needs more than 10 hours of light per day, and even during winter dormancy it should be placed in a weak-light or scattered-light spot indoors, avoiding contamination from cooking fumes. When overwintering in winter, never move the white magnolia into the kitchen. Yellow leaves on white magnolia can have two causes: iron-deficiency chlorosis and root rot from excessive water.

① Chlorosis: mainly caused by potting soil that is too alkaline.

② Symptoms of root rot: the root system turns black and rots, the leaves wither and yellow and drop off, leading to the death of the whole plant. Therefore, normally wait until the surface of the potting soil turns pale before watering, and loosen the soil frequently.

5. Spring care and management. When the flowers fade, promptly cut back to about 3-4 stem nodes below the spent flowers, and at the same time thin out some old stems and overly dense stem nodes to improve ventilation and adapt to the home balcony environment. After flowering in March, there is a short dormant period, during which fertilization and watering should be stopped.

6. Summer care. Crab claw orchid (Schlumbergera) can grow slowly at 15°C, grows faster at around 25°C when the air is also fairly humid, and when the temperature exceeds 30°C it should be kept in a shaded environment.

7. Autumn and winter care. In early autumn the temperature is still high, so spraying the leaves and sprinkling water in the environment should continue. From September onward, the crab claw orchid gradually regrows; in mid-to-late September, as the temperature drops, it can see sunlight in the morning and evening. In mid-to-late October it should receive full sun to promote flower bud differentiation and produce more buds. By early-to-mid November, as the temperature turns cold, the crab claw orchid must be brought indoors to overwinter, and indoors it should also be placed in a spot with ample sunlight. However, during the flowering period it should avoid direct sunlight to prolong the blooming period. In autumn, watering should be moderate, and the potting soil should still be kept moist, neither dry nor waterlogged; being too dry, too wet, a sudden drop in temperature, or too large a day-night temperature difference can all cause flowers and buds to drop.

8. In winter the temperature is low, so the crab claw orchid's evaporation decreases accordingly, and watering must be watched carefully, as plants often die from root rot caused by overwatering in winter. Autumn and winter are the period when the crab claw orchid buds and blooms, so apply a phosphorus-rich top dressing once every 7-10 days, and stop fertilizing during the flowering period. Winter temperatures fluctuate easily, so do a good job of keeping it warm and ventilated. When the room temperature drops to 5°C, protect it from freezing. Growing crab claw orchids is common in some households in the Jiangnan region; when the room temperature cannot be kept at around 15°C, even with a pot full of flower buds, they are hard to open.

White magnolia can be exposed to the sun

White magnolia likes warmth and sunlight, and needs enough sunlight all year round. In winter, during dormancy, it should receive a little sunlight while being protected from cold and kept warm; in summer and autumn, during the growth and flowering period, it should have even more sufficient light. With enough light, it grows well and blooms profusely with fragrant flowers; with insufficient light, the branches and leaves grow weak and spindly, and it blooms little with poor fragrance. In addition, water when the potting soil is dry; especially in the high temperatures of summer and autumn, water thoroughly and generously. Water when the potting soil is dry. If the potting soil stays too dry for too long, it will cause leaves to yellow and drop off, affecting growth. But note that the potting soil must drain freely to prevent waterlogging, otherwise the roots will rot and the leaves will fall. For fertilizing, as with milan (Aglaia odorata) and jasmine, adopt the method of "light fertilizer, frequent application".

White magnolia drops a large number of leaves in winter

Whenever white magnolia overwinters indoors or in a greenhouse in winter, it often experiences the phenomenon of dropping leaves in large numbers; this happens even more when a greenhouse alternates between hot and cold. The reasons: first, the potting soil is not properly dry or wet, alternating between dry and wet, and the fleshy roots cannot handle it, causing water in the leaves to flow back, resulting in leaf drop. Second, the room temperature rises, the environment becomes stuffy and hot, and ventilation is not provided in time, which causes the same situation. Another reason is simply exposure to cold.

To prevent white magnolia from dropping leaves in large numbers during winter, when the potting soil has dried, do not use too much water in a single watering. Keep the room temperature between 5-10°C, not too high or too low. Increase environmental humidity and indoor ventilation, keeping the air moving. In this way the leaf drop of white magnolia can be reduced somewhat. In addition, as long as the terminal buds are still intact, a white magnolia that has dropped its leaves will grow new leaves again after warm spring arrives and it is taken outside.

How does white magnolia overwinter

Potted white magnolia brought indoors to overwinter often drops leaves. First brown spots appear on the leaves and the tips dry, then the leaves fall off; after new leaves grow they soon drop again. The main cause is that the room temperature is too high: when the temperature exceeds 15°C, the orchid, which has entered relative dormancy, sprouts again, and after the new buds appear, due to the physiological phenomenon of metabolism, the old leaves drop off accordingly. However, these newly grown leaves and new shoots, because indoor light and temperature conditions are insufficient, are thin and weak and very prone to turning yellow and dropping.

For home potted white magnolia, bring it indoors after the "Autumn Equinox", and the room temperature must not be too high; around 10°C is more suitable. Pay attention to indoor air circulation, but do not open windows directly to let cold wind blow on it. The potted plant should be placed in a spot with ample light, watering should be restricted, and fertilization prohibited.

After the "Start of Winter", if the temperature drops, you can make a plastic tent cover and cover the white magnolia with it, which both ensures relatively stable temperature and provides a certain humidity and protection from smoke and dust pollution. Note that the tent cover should have ventilation openings, so that the humidity does not become too high and cause mold to develop. When the room temperature becomes too high in spring, find a way to lower it.

Around the "Qingming" period, on a clear, windless midday, it can be moved outside and placed in a wind-sheltered, sunny spot, and the leaves sprayed with water. At night or when a cold wave comes, it should be moved back indoors. After this transition period, once the temperature stabilizes above 10°C, it can be given normal care outdoors.

How to grow white magnolia: cultivation methods and precautions for white magnolia

White magnolia has large flowers and a beautiful appearance with a faint delicate fragrance, making it a very valuable ornamental plant. White magnolia is a variety originally obtained by hybridizing orchids, and is an evergreen plant in the southwestern and South Asian regions. The petals of white magnolia are edible and delicious. How is white magnolia best grown? Below, let's look at the cultivation methods and precautions for white magnolia.

I. Cultivation methods for white magnolia——propagation

White magnolia can be propagated through sowing, grafting and other means. The most common propagation method for white magnolia is layering, which allows white magnolia to take root after two months. In the plum rain season, white magnolia obtained by grafting orchid branches can become a flowering plant in about two months.

II. Cultivation methods for white magnolia——soil covering

White magnolia can be grown in pots. The soil needs to be fairly loose and well-aerated. For the soil used to grow white magnolia, clay pots and purple clay and similar materials can be used more often. The soil particles in the pot should not be uniform and unchanging; soil particles of varied diameters are more conducive to water drainage and seepage.

III. Cultivation methods for white magnolia——pruning

After being potted, white magnolia needs sufficient plant height; prune away the excess branches at the top, which is more conducive to plant growth and produces more flower buds. Before white magnolia is moved into a pot, diseased branches, dead branches and overly dense branches can be cut off in time. In this way nutrients will not be absorbed and consumed in vain.

How to grow white magnolia: home cultivation methods and precautions for white magnolia

Propagation

Grafting, cuttings, layering and sowing are the most commonly used propagation methods for white magnolia, among which grafting and layering are used most.

Layering is suitable in June-July; use the air layering method and keep the plant moist, and it will take root in about 2 months.

For grafting, the rootstock should be a two-year-old branch. In the plum rain season, take a branch of the same thickness as the rootstock; about 60-70 days after grafting is completed it will have healed, and it can then be cut away from the mother plant.

Potting soil

For home potting, the choice of soil should emphasize aeration and looseness, and it should also be rich in humus.

Flower pots such as clay pots, purple clay pots and plastic pots with more drainage holes at the bottom have better aeration, and granular soil of varying sizes is more conducive to water seepage and aeration.

Repotting

The size of the flower pot should be chosen according to the crown size and age of the white magnolia, so that the plant's growing environment is more suitable.

Repot when the potting soil is slightly dry. The specific method is to slowly tilt or invert the pot, supporting the pot while firmly holding the plant, then tip out the white magnolia and move it into a new pot.

If a new pot is being used, first sprinkle a small amount of loose soil and base fertilizer into it, then water thoroughly, and once it has settled in after planting, it is fine.

Planting position

The time to move potted white magnolia outdoors is March-April each year; simply place it in a spot with ample light.

In summer when temperatures are high, take corresponding measures such as using shade netting or a simple shade shed for cooling-related care, so that white magnolia receives ample light while also avoiding excessive direct strong light, preventing sunburn damage to the branches and leaves of white magnolia.

Pruning

When pruning the terminal buds and shortening some side branches, pay attention to choosing the height; a suitable pruning position will promote side branches, flower buds and flowering.

Before white magnolia is placed indoors, cut off dried, leggy, diseased and overly dense branches to minimize nutrient consumption; when placed outdoors, you may remove old leaves at the base of the branches as appropriate, which is beneficial for encouraging new branch growth.

Fertilizing

White magnolia needs more fertilizer for growth; when growth is vigorous, keep fertilizing about once every half month, or apply 2-6 grams of compound fertilizer (nitrogen, phosphorus, potassium).

When fertilizing, the fertilizer must not directly touch the roots; it should gradually penetrate deeper into the soil along with watering, to prevent "burning the roots".

Apply light fertilizer frequently (cake fertilizer). In winter no fertilizing is needed. From the following year when new buds sprout until June, fertilize with fertilizer water once every 3-4 days; from July to September, once every 5-6 days. The number of fertilizations can be changed according to actual conditions.

Watering

White magnolia should be watered in moderation, and beware of waterlogging. As with many household flowers, adopt the method of "no watering until dry"; do not water too frequently, and you may moderately sprinkle water on the leaves and around the plant.

For white magnolia, note that after rain the accumulated water in the pot must be poured off promptly to prevent root rot.

Temperature

White magnolia is prone to cold damage, so temperature is the key to whether white magnolia can overwinter safely. Outside South China, it must be brought indoors for care in winter, and the room temperature should be kept at least above 5°C, until the Qingming and Guyu periods, when it can be placed outdoors again.

In summer during high-temperature weather, effective measures should be taken to help white magnolia cool down.

Light

Although white magnolia needs ample light, in summer it is best placed under a shaded flower shed; move the shade away when the light is suitable, and put the shade back in place when the light is strong at midday.

When placing white magnolia indoors, give priority to a light-transmitting spot with ample sunlight.

Pest and disease control

Common white magnolia diseases include chlorosis, root rot and anthracnose.

Before diseases occur, enhance the plant's resistance through ventilation, loosening the soil and controlling watering; after diseases occur, immediately carry out scientific spraying of medicinal solution.

Common pests include red spider mites, scale insects and aphids.

Before pests occur, prevent them by frequently spraying water to raise humidity; after pests occur, when the infestation is mild you can rinse the leaves with clean water, and when severe you need to spray insecticide.

This article gives a fairly comprehensive overview of how to care for white magnolia. If you want to know what more detailed key points and techniques there are for each aspect, please read other articles related to white magnolia.