What to Do When White Orchid Tree Leaves Turn Yellow? Learn How to Deal with Root Rot

The white orchid tree (Magnolia alba) is a rather precious flowering plant, not only of very high ornamental value but also with a very wide range of uses; growing it at home can even bring good feng shui, making it deeply loved by gardening enthusiasts. But mastering the correct way to grow the white orchid tree is something every gardening enthusiast wants to understand, because improper care will cause various symptoms in the plant, such as yellowing leaves and root rot.

What to Do When White Orchid Tree Leaves Turn Yellow

1. Water appropriately

The amount of water should be constantly adjusted according to humidity and many other factors, to ensure the soil maintains a normal and suitable level of moisture.

2. Suitable temperature

Avoid situations where the temperature difference is too great; maintaining an average temperature of 5-10°C is more suitable. When the temperature rises, pay special attention to ventilation and air flow in the growing environment, and at the same time humidify the dry air.

3. Sufficient light

To ensure sufficient light, the white orchid tree needs to be placed in a courtyard, on a home balcony, windowsill or other spot that receives light for a long time, but in summer take care to avoid direct strong light, as harsh sun exposure will likewise have an adverse effect on the plant.

4. Prevention and treatment of chlorosis

Use slightly acidic soil, and apply alkaline inorganic fertilizers only in small amounts. When the disease appears, spray the leaves with ferrous sulfate (0.2%), once a week, for 3-4 consecutive sprays, or spray with alum fertilizer water once a week, for 3-4 consecutive sprays, to relieve the condition.

5. Prevention and treatment of root rot

This disease usually occurs because of excess water. Watering should follow the rule of “no watering until dry,” and keep the soil loose to enhance its drainage. During the plum rain season or other times of heavy rainfall, take timely measures to shelter the plant from rain; when potting, add more broken tile pieces at the bottom of the pot to speed up water flow and promote drainage.

How to Deal with Root Rot in the White Orchid Tree

1. Repot as early as possible

What to do about root rot in the white orchid tree? Once root rot is discovered, the plant must be given new soil and repotted with new growing medium. The medium should be of good quality and have good drainage and water absorption; fired soil or dry soil, charcoal and similar media are preferable. You can also appropriately mix and cover some coarse sand around the rhizome base, which works fairly well.

2. Control sunlight

For a period after repotting, the plant must not be exposed to harsh sunlight; place it in a shaded, well-ventilated spot, but note that the wind should not be too strong, to avoid adverse effects.

3. Pay attention to repotting and planting methods

Besides ensuring that the potting soil drains well, the medium from below the rhizome head down to near the roots should be firm and dense, and the rhizome head should be planted somewhat deeper, which both protects it and prevents the rhizome head from wobbling or floating away from the soil surface. Rotten roots and shriveled, yellowing leaves should be cut off to reduce nutrient loss, so that the nutrients in the rhizome head can be stored to maintain root development.

4. Water reasonably

In cultivation and management, water is still very important for plant growth, so water use must be strictly regulated. The potting soil is best kept half-moist and just dry; it should neither dry out to the point of turning white nor be obviously too wet. If rainy weather occurs, move the plant to a sheltered place, and manage the potting soil moisture as well as possible to ensure normal root development.

What Kind of Soil Is Best for Growing the White Orchid Tree

Its roots are fleshy, so it needs soil with fairly good permeability. It is also a southern flower that likes slightly acidic soil and water, so it is best to use a mix of coarse sand and gravel, garden soil and rotten leaves. With attention to water, fertilizer, light and temperature care, it can certainly grow very well. If you are in the north, where alkaline soil is more common, you can add some sulfur powder when mixing the soil to help increase its acidity.

How to Care for the White Orchid Tree in the Bedroom

1. Potting soil

Use soil that is sufficiently fertile, loose and well aerated; it is best not to use clay soil, which has rather poor aeration. If potting it, you can use an earthenware pot with bricks placed underneath to raise it up, which helps it drain. A 5 cm thick layer of crushed stone can be spread at the bottom of the pot. The soil's pH is best between 5.5-6.3. If you are in the northern region, this flower is generally hard to grow, because the soil and water there tend to be alkaline, which dissolves a certain substance in its cells and causes poor growth.

2. Watering

Its roots are fleshy. If the soil is too wet, the leaves will turn yellow and fall off, and root rot may even occur. If there is no water, it will wilt and its leaves will curl, so it fears both drought and excess water. During its full bloom period, if the flowers open too widely, it means there is not enough water; if there is enough water, the flowers will be in bud form that day. Once the surface soil in the pot is dry and has even cracked, water it immediately.

3. Points to note

Its fragrance is rather strong, so if it is placed in a bedroom, it is best to put it in a sufficiently ventilated area, otherwise the irritation to the respiratory tract is still fairly strong.

Growing the white orchid tree is not very difficult. It likes a growing environment with sufficient light that is warm and humid, but waterlogging easily causes root rot, so when planting the white orchid tree, gardening enthusiasts should choose potting soil that not only has good ventilation but also fairly good drainage.