5 Causes of Yellowing Leaves on Wax Begonia and How to Treat Them

If the young leaves at the top of the wax begonia turn pale yellow, the older leaves also gradually yellow, and the new shoots wither, it is generally caused by overwatering or prolonged rain exposure, which makes the pot too wet, leading to a lack of oxygen in the soil and rotting of the wax begonia's roots.

Loosen the soil around the wax begonia regularly, and make sure the pot has good drainage when repotting. Try to ensure there is no standing water in the pot. So gardeners should control the amount of watering in normal care and avoid rain exposure.

If wax begonia is kept indoors for a long time, it easily lacks sunlight. With no sunlight for a long period, wax begonia will also develop yellow leaves.

Generally, move the potted wax begonia to a place with sunlight, but the new location should avoid strong direct light.

If the leaf color at the top of the wax begonia is normal, but the lower leaves gradually dry, yellow and fall off upward, it is generally caused by the pot soil being too full or the water not penetrating for a long time, which causes the lower leaves and stems to age.

When watering, gardeners should control the amount of water; just keep the wax begonia's pot soil moist. In addition, you can sprinkle a little water on the leaves.

Wax begonia is a flowering plant that likes acidic soil. When gardeners notice its leaves gradually turning yellow, it may also be caused by the soil being alkaline.

You can water the wax begonia with water soaked in green grass. If the water in the north is alkaline, add a little ferrous sulfate appropriately, and the leaves will turn green.

a. The leaves are thin and yellow. This is caused by the plant being large while the pot is small, or by not repotting or changing the soil for a long time, or by insufficient fertilizer. Gradually increase water and fertilizer, and repot in due course.

b. If the leaves appear uneven and not spread out, the new leaves are thick and the old leaves gradually yellow, water frequently, pause fertilizing, and you can scatter a few vegetable seeds in the pot; after they sprout, pull them out to consume the fertilizer in the pot and restore the plant to normal growth.

What to Do When Wax Begonia Leaves Turn Yellow: Finding the Cause Is Key

Wax begonia. As the name suggests, it can bloom in all four seasons. Wax begonia is very suitable for home cultivation. As an ornamental plant, yellowing leaves will affect its ornamental value. So what should be done when wax begonia leaves turn yellow? Let's take a look at the diagnosis and treatment methods together.

I. What to Do When Wax Begonia Leaves Turn Yellow?

1. Sudden environmental changes cause wax begonia leaves to turn yellow: Sudden environmental changes include discomfort with the soil environment. Wax begonia is a flowering plant that loves acidic soil. The leaves gradually yellow because the soil is alkaline.

Solution: You can water with water soaked in green grass and apply a little ferrous sulfate, and the leaves will turn green.

2. Overwatering causes wax begonia leaves to turn yellow (water yellowing): The young leaves at the top of the plant turn pale yellow, the old leaves also gradually yellow, and the new shoots wither. This is caused by long rain or overwatering, which makes the pot too wet, the soil lack oxygen, and the roots rot.

Solution: Loosen the soil often, control watering, and avoid heavy rain spraying.

3. Long-term lack of water causes wax begonia leaves to turn yellow (drought yellowing): In dry soil, the leaf color at the top is normal, while the lower leaves gradually dry, yellow and fall off upward. This is caused by the pot soil being too full or a long-term lack of water, which causes the lower leaves and stems to age.

Solution: Water appropriately and keep the soil moist.

4. Exposure to strong sun causes wax begonia leaves to turn yellow (sunburn yellowing): Wax begonia is a flowering plant that likes a cool environment. If placed in direct sun, its leaves will also turn yellow and fall off.

Solution: The solution here is to move it to a cool, ventilated place.

5. Dry air causes wax begonia leaves to turn yellow: Wax begonia likes warmth and is not cold-tolerant. It grows well in a slightly shady, humid environment and moist soil. It fears dry environments and waterlogging, and dry air directly causes the leaves to turn yellow.

Solution: Increase indoor air circulation.

6. Insufficient sunlight causes wax begonia leaves to turn yellow (light-deficiency yellowing): If potted flowers are often placed indoors, the plant easily develops yellow leaves.

Solution: Appropriately increase the duration of light exposure.

7. Too high a temperature causes wax begonia leaves to turn yellow: Wax begonia likes a semi-shaded environment. In midsummer, high temperatures can cause the leaf edges to scorch and the leaves to curl.

Solution: Move it indoors to lower the temperature.

8. Too low a temperature causes wax begonia leaves to turn yellow: Too low a temperature slows growth and makes the leaves turn yellow.

Solution: In winter, when the temperature is low, place it in a spot with ample sunlight.

9. Too much fertilizer causes leaves to turn yellow (fertilizer yellowing): With too much fertilizer, the plant's leaves appear uneven and not spread out, the new leaves are thick, and the old leaves gradually yellow.

Solution: Water frequently, pause fertilizing, and you can scatter a few vegetable seeds in the pot; after they sprout, pull them out to consume the fertilizer in the pot and restore the plant to normal growth.

10. Long-term lack of fertilizer causes leaves to turn yellow (fertilizer-deficiency yellowing): The plant's leaves are thin and yellow. This is caused by the plant being large while the pot is small, or by not repotting or changing the soil for a long time, or by insufficient fertilizer.

Solution: Gradually increase water and fertilizer, and repot in due course.

11. Root rot causes wax begonia leaves to turn yellow: When the pot soil is excessively wet, it causes root rot and makes the leaves turn yellow.

Solution: In mild cases, immediately control watering and move the pot

12. Pests and diseases cause wax begonia leaves to turn yellow: In plants affected by stem rot, dark spots first appear at the base of the stem near the soil surface, and after expanding they become brown, shrink and rot. When the pathogen infects the leaves, it causes dark green water-soaked round spots; when it infects the leaf stalks, they become brown and rot. The leaf color turns yellow.

Solution: At the early stage of the disease, spray with 95% Lüheng No. 1 premium 3000x solution, or 20% tolclofos-methyl EC 1200x solution, 50% validamycin wettable powder 1000x solution, or potassium permanganate 1200-1300x solution.

II. The Uses of Begonia

1. Ornamental value: Begonia has been a famous flower appreciated by both refined and popular tastes since ancient times. It has long been known as the "fairy among flowers," the "imperial consort among flowers," and the "noble among flowers." In imperial gardens, it was often planted together with magnolia, peony, and osmanthus, creating the artistic conception of "jade hall wealth and honor." Begonia is planted along both sides of pedestrian walkways, around pavilions and terraces, at the edges of groves, and by watersides and ponds.

2. Purifying effect: Although begonia has no fragrance, it still has a good purifying effect. Begonia has strong resistance to sulfur dioxide and is often planted in urban street green spaces and mining area landscaping.

3. The four begonias: There are four kinds of begonia, all woody. These four are: Malus spectabilis (Hall crabapple), Malus halliana (Hall crabapple), Chaenomeles sinensis (Chinese quince), and Chaenomeles speciosa (flowering quince). As one of the traditional begonias, Chaenomeles sinensis has splendid flowers, a good tree shape, and few pests and diseases, making it a good tree species for courtyard landscaping. It can be planted in clumps at courtyard wall corners, forest edges, and other places. In spring you can enjoy its flowers, and in autumn you can view its fruit. Its branch form is unique, making it an excellent tree species for arranging garden landscapes.

4. Bonsai making: Chaenomeles sinensis is a commonly used bonsai tree species, suitable for making bonsai in different forms such as straight-trunk style, slanting-trunk style, double-trunk style, curved-trunk style, waterside style, exposed-root style, forest style, and multi-trunk single-base style.

Causes of Curling and Yellowing Leaves on Wax Begonia, and Solutions for Curling and Yellowing Leaves on Wax Begonia

When wax begonia is grown at home, its fragrance is pleasant when it blooms, and it is deeply loved by gardeners. However, some gardeners find that their begonia leaves curl and turn yellow during growth. What causes the leaves to curl and turn yellow? What should be done when wax begonia leaves curl and turn yellow? Let's learn about it together.

Too much watering causes wax begonia leaves to turn yellow

Wax begonia likes a relatively humid climate, so places with high humidity are suitable for its growth. However, it must never have waterlogged soil. If watered too much, or if it suffers from a storm, the pot soil will become waterlogged, causing the plant's roots to rot and the leaves to turn yellow.

To prevent this situation, pay attention to controlling water when watering, and move the potted plant to a cool, ventilated place. Wait until the leaves turn green again before carrying out normal care. Or, in severe cases, you can use pruning to encourage new shoots to sprout from the base. In summer, if the pot soil is too dry, it will cause the plant to wilt and the leaves to wither and yellow.

Insufficient light causes wax begonia leaves to turn yellow

Wax begonia likes a semi-shaded, semi-humid environment. In midsummer, if it receives strong light, the leaves will scorch and curl. Move the plant to a ventilated, cool place and shade it appropriately. If it is not too severe, it can return to normal.

However, if the plant grows in a place with insufficient light, its growth will be weak, its vigor will decline, it will bloom less, and the flower color will be pale. Therefore, in addition to shading during the high heat of summer, in spring and autumn it should be placed in a place with ample scattered light. In winter, when the temperature is low, it can be placed on a balcony with direct sunlight to ensure photosynthesis.

Improper fertilizing causes wax begonia leaves to turn yellow

During growth, if too little fertilizer is applied and there is no base fertilizer, the plant will grow short and small, with insufficient nutrients, and the leaves will be pale or yellow. If too much fertilizer is applied, and if heavy fertilizing continues in summer, it will lead to disease, root rot, and yellowing leaves.

The above is all the content I have learned today about wax begonia. I hope gardeners will find it helpful after reading this article. If you want to learn more about wax begonia, please continue to follow Duorou Huapu, and we will provide you with more related knowledge!