Causes and Solutions for Yellowing Leaves on the Umbrella Tree

Because the umbrella tree (Schefflera arboricola) can purify the air and has high ornamental value, it has become a choice for many enthusiasts to grow. Its leaves can absorb nicotine and harmful gases from smoke, safeguarding human health. If its leaves turn yellow and drop severely, its ornamental value will be affected. So what should you do when the umbrella tree's leaves turn yellow and drop? Below, Shuaishuai will explain the causes and solutions for yellowing and falling leaves on the umbrella tree!

I. Causes

1. Improper watering

Watering is often a technical task that many growers fail to get exactly right. Water too much and there will be water accumulation; water too little and the potting soil will become too dry, causing the umbrella tree's leaves to droop and fall off, ultimately leading to leaf drop.

2. Unsuitable light

The umbrella tree is a shade-loving plant and needs to be grown in a spot with scattered light. Insufficient light will cause the leaves to turn yellow, and too strong light is also one of the causes. The umbrella tree is not suited to growing under strong light. Even if we move it to a suitable environment, it must adapt slowly. If it is suddenly moved from a dark place to a place with very strong light, leaf drop will become even more severe, so this must absolutely not be done.

3. Improper fertilizing

The umbrella tree has a certain demand for fertilizer and is a fertilizer-loving plant. This can cause the leaves to turn yellow and drop. If raw fertilizer or concentrated fertilizer is applied carelessly, it will greatly irritate the plant, and in severe cases burn the roots, causing the leaves to turn yellow and drop.

4. Pests and diseases

The umbrella tree is often affected by diseases, such as leaf spot disease. Once it occurs, brown spots appear, then spread to the entire leaf, causing the leaf to die and drop.

II. Solutions

1. Apply enough fertilizer and apply it well

The umbrella tree has a relatively high demand for nutrients during its growth period. When fertilizing, choose granular nitrogen-phosphorus-potassium fertilizer and work it in after loosening the soil. From April to September, apply diluted fertilizer water once a month. This can raise the overall fertility of the soil, and fertilizer containing only a single element must not be used. If too much fertilizer is applied, take the roots out of the pot, wash them clean with water, and replant in new soil.

2. Water correctly

The main thing with watering is actually to control whether the amount each time is just right. As long as the potting soil can be kept sufficiently moist, that is enough. Before watering, you need to observe whether it is in a state of water deficiency. You can dig 1 cm into the soil; if it is still dry, that means it needs watering. In winter, reduce watering somewhat; occasionally moistening the leaves is enough.

3. Moderate light

After all, it is a shade-loving plant. Apart from summer, control full sun exposure of more than 6 hours per day. In summer, it can be placed back indoors, such as on a balcony with scattered light or another bright spot.

The above are the causes and solutions for yellowing leaves and leaf drop on the umbrella tree. For plants valued mainly for their ornamental appearance, the look must be good, so for a foliage plant like the umbrella tree, the first thing we need to do is ensure its daily care and growing conditions are intact. The rest depends on the elements that affect leaf growth and development. Once these are handled well, there is no need to worry.