What to Do When Potted Phalaenopsis Leaves Turn Yellow? Temperature, Light and Watering Are Key

Growing Techniques Jan 1, 1970 0 views

As an excellent choice for indoor growing, the Phalaenopsis orchid has flowers shaped like butterflies and elegant colors that give a stunning impression, making it deeply loved by flower enthusiasts. However, during the growing process, many enthusiasts run into a real headache: yellowing leaves. So what should you do when a potted Phalaenopsis has yellowing leaves? It is actually very simple.

1. What to Do When Potted Phalaenopsis Leaves Turn Yellow: Find the Cause

In the Phalaenopsis growing methods and precautions, we have already mentioned that once soil, light or water fails to meet the standard, yellowing leaves will result. As for what to do when a potted Phalaenopsis has yellowing leaves, we first need to identify the cause, then address it accordingly. Below are the causes of yellowing leaves in potted Phalaenopsis and their solutions; read on.

2. Causes of Yellowing Leaves in Phalaenopsis and Solutions

1. Overwatering

As we mentioned earlier, water is crucial to the growth of Phalaenopsis, so improper watering has very serious consequences. Overwatering easily causes root rot in Phalaenopsis, which leads to yellowing leaves; underwatering means the leaves cannot absorb water, which likewise causes yellowing leaves.

Solution: (1) For overwatering, place the plant in a ventilated spot to dry out, and repot with fresh soil if necessary; (2) For underwatering, increase the amount of water, but not too much - it is enough to feel the soil is moist by hand.

2. Temperature Too Low or Too High

Phalaenopsis is native to tropical regions, so it has high temperature requirements, with an optimal growing temperature of 18-28°C. Phalaenopsis is not tolerant of high heat or severe cold; above 32°C or below 15°C will affect its growth, leading to yellowing leaves.

Solution: Pay extra attention in both summer and winter. When the temperature is above 32°C or below 15°C, move the Phalaenopsis indoors to ensure it grows in a suitable environment, and use an air conditioner if necessary.

3. Light Too Strong

Too much light is also one of the causes of yellowing Phalaenopsis leaves. Phalaenopsis prefers semi-shaded environments and diffused light. Strong light or long-term placement in a dark environment will both affect the orchid's photosynthesis, causing the leaf surface to turn yellow and soft.

Solution: Normally, while ensuring sufficient light, take care to avoid strong direct sun. From May to October, avoid direct sunlight; in winter, it can be placed on a warm balcony.

4. Pests and Diseases

When it comes to yellowing Phalaenopsis leaves, many people first think of bugs. Pests such as red spider mites and scale insects can also cause Phalaenopsis leaves to turn yellow and soft. So enthusiasts should normally ensure air circulation, promptly clean up dead branches and rotten leaves, observe the plant's surrounding environment often, and keep the growing area clean.

Solution: When pests first appear in small numbers, you can gently wipe the insects off the leaf surface with a soft-bristled brush, or spray pesticide to eliminate them. As for more specific pest and disease control for Phalaenopsis, it has been covered earlier, so we will not go into it further here.

2. Yellowing Phalaenopsis Leaves: On-the-Spot Diagnosis

Although the above causes and solutions for yellowing Phalaenopsis leaves are quite comprehensive, for beginners, determining exactly where the problem lies is the most difficult part. Below is an analysis of the symptoms and causes of yellowing Phalaenopsis leaves:

1. The top of the new growth shrivels, young leaves turn pale yellow, and old leaves gradually turn dark yellow.

Waterlogged too long: If this happens, your Phalaenopsis is likely suffering from prolonged waterlogging and poor soil aeration, with some roots rotting.

Solution: Control watering and stop fertilizing.

2. The new leaves of the Phalaenopsis grow thick and glossy, but the leaf surface is uneven, and the old leaves gradually yellow and fall off.

Overfertilizing: With the above symptoms, there is no doubt you have overfertilized. Everyone should note that for Phalaenopsis in the growing season, more fertilizer does not mean faster growth - there is a question of quantity involved.

Solution: Immediately stop fertilizing, water appropriately more, and sow some radish or cabbage seeds in the pot; pull out the seedlings a few days after they sprout to consume the excess fertilizer in the pot. Sowing seeds is not suitable in winter; instead, you can transplant a few small plants, then remove them and plant them elsewhere.

3. The top and new leaves of the Phalaenopsis are normal, but the lower leaves dry, yellow and fall off first.

Insufficient water: In this situation, there is definitely a problem with your usual watering, because the yellowing leaves here are caused by long-term failure to water thoroughly, leading to dehydration of the Phalaenopsis.

Solution: Water appropriately to keep the potting soil moist throughout.

How to Grow Potted Phalaenopsis: Phalaenopsis Growing Methods and Precautions / Water Is Key

The Phalaenopsis orchid, as its name suggests, grows like a butterfly and has vivid colors that look extremely beautiful. In daily life, the first consideration when growing flowers is beauty, so many enthusiasts choose to grow Phalaenopsis; however, many of them do not know how to grow it. In response, we have carefully compiled the Phalaenopsis growing methods and precautions - follow them, and even beginners can grow it too.

1. How to Grow Potted Phalaenopsis: Water Is Key

Growing plants indoors means losing nature's favorable conditions, so there is a lot we need to do to grow them well. For growing potted Phalaenopsis, you first need potting soil, and then there are requirements for light, temperature, fertilizing and watering. For specifics, just look at the Phalaenopsis growing methods and precautions, among which water is the most critical link.

2. Phalaenopsis Growing Methods and Precautions

1. Soil: Slightly Acidic

Unlike other flowers, Phalaenopsis has very high soil requirements, generally needing a slightly acidic soil that is airy, well-draining and rot-resistant. As the most important part of Phalaenopsis growing methods and precautions, we recommend simply buying special orchid soil for Phalaenopsis at the flower market.

Precautions: Once the soil is sorted out, the pot also needs attention. Enthusiasts should choose a suitable pot - do not use a small pot for a large plant, nor a large pot for a small plant, as either will give the Phalaenopsis a poor growing environment.

2. Light: Avoid Direct Sunlight

Loving shade and coolness is one of the characteristics of Phalaenopsis, but all green plants need sufficient light to produce the energy they need. So Phalaenopsis should also receive some light, especially before and after the flowering period; appropriate light can promote blooming and make the flowers vivid and long-lasting.

Precautions: Phalaenopsis should generally be placed in a spot indoors with diffused light, not direct sunlight; if placed on an indoor windowsill, use a window screen to block part of the sunlight, otherwise direct exposure to strong sun will easily make the leaves yellow and dry.

3. Water: Water When Dry, Stop When Wet

In Phalaenopsis growing methods and precautions, soil and light are of course essential, but water is what we need to pay the most attention to. Phalaenopsis leaves are not the type that easily store water, so the soil needs to hold enough moisture. The specific watering method is as follows:

(1) Growing season: water more;

(2) Dormant season: water less;

(3) Spring and autumn: water once a day around 5 p.m. in both seasons; in summer, when the plant grows vigorously, water once each at 9 a.m. and 5 p.m.;

(4) Winter: light is weak and temperatures are low, so watering once every other week is enough, preferably before 10 a.m.;

(5) Cold wave period: do not water; keep it dry, and resume watering after the cold wave passes.

Precautions: Water moderately, not too frequently - too frequent watering will rot the Phalaenopsis roots. In addition, be careful not to let water accumulate in the crown of the Phalaenopsis, and do not splash water on the leaves in winter either.

4. Temperature: 15-30°C

In Phalaenopsis growing methods, its temperature requirements are also very high, generally 15-30°C. If below or above this range, it will stop growing or develop yellow leaves.

Precautions: Keep the temperature steady. Home-grown Phalaenopsis very easily stops growing due to low temperatures, so in winter, enthusiasts must be sure to keep their Phalaenopsis warm.

5. Proper Fertilizing

How to grow Phalaenopsis - fertilizing is also a very important part, because Phalaenopsis loves fertilizer, and proper fertilizing can promote plant growth. Otherwise, if fertilizing is too infrequent, it will bloom very little the next year.

Precautions: Do not think that once the growing season arrives you should fertilize heavily; generally fertilizing once every 7-10 days is enough. During the peak growing season, apply a top dressing once every 5-7 days; in slow-growing seasons, once every 20-30 days; when winter temperatures drop below 15°C, stop fertilizing.

6. Good Ventilation

In Phalaenopsis growing methods, ventilation is also a key part. Phalaenopsis also has quite high requirements for air quality; potted Phalaenopsis generally needs frequent ventilation to prevent pests.

7. Proper Pruning

How to grow Phalaenopsis - proper pruning is also very important. After the Phalaenopsis blooms, enthusiasts need to cut off the withered flowers, which reduces nutrient consumption, and withered flowers hanging there also look unattractive.

3. Precautions for Phalaenopsis

Although the Phalaenopsis growing methods above already include quite a few precautions, to grow Phalaenopsis well there are still many things enthusiasts need to pay attention to. The precautions for Phalaenopsis, simply put, also include the following points:

1. Shading

Summer is the period of vigorous growth for Phalaenopsis, so shading must be provided to prevent leaf scorch. Generally shade 50%-60%; autumn sunlight is also fairly strong, so until September, 50% shading is still needed, and only after October can the shading material be removed.

2. Repotting

After Phalaenopsis blooms, the flower stalk should be cut off promptly and the plant repotted. After removing it from the pot, take off the old medium, cut away rotten and withered roots, and after replacing with new medium, continue normal care.

Reasons for Failure with Potted Phalaenopsis: How to Care for It Correctly

Phalaenopsis

When in full bloom, the flowers of the Phalaenopsis orchid look very much like dancing butterflies, appearing even more lively under the sunshine. It can be seen in many homes, offices and gardens, and in some regions it can also serve as a bride's bouquet. This shows how important Phalaenopsis is in people's lives, but we also often hear enthusiasts report failure with potted Phalaenopsis. Is it really so hard to grow Phalaenopsis successfully?

1. Reasons for Failure with Potted Phalaenopsis

1. Watering Too Frequently

Friends who grow Phalaenopsis always worry it lacks water, so regardless of whether the growing medium is dry, they water it every day, causing severe root rot.

2. Temperature Too Low

Usually, blooming Phalaenopsis plants hit the market mostly in early spring, and after being bought they are generally placed in living rooms and similar spots for viewing. Although the daytime temperature in these places is adequate, the nighttime temperature is somewhat on the low side. On the other hand, professionally grown orchids are mostly kept in well-equipped greenhouses; by comparison, the temperature and humidity at home are somewhat lacking, so the plant's vigor tends to decline day by day. Therefore, sometimes no matter how well it is cared for, the orchid still may not bloom.

3. Overfertilizing

Applying fertilizer whenever there is some, without paying attention to concentration, thinking that fertilizing will make it grow faster. You should know that Phalaenopsis prefers light fertilizing, applied in small amounts and often. Remember that "overfeeding" must not be excessive, or it will backfire.

4. Small Plant in a Large Pot

Thinking that using a large pot gives the Phalaenopsis a roomier environment and plenty of medium. In fact, after using a large pot, the sphagnum moss does not dry easily, and you should know that Phalaenopsis likes good aeration - when air flows, it thrives.

Phalaenopsis

2. How to Grow Phalaenopsis Well

1. Temperature

Phalaenopsis is native to tropical regions and prefers a high-temperature, high-humidity environment. During the growing period, the minimum temperature should stay above 15°C, and the optimum growing temperature is 20-30%; when summer exceeds 35°C or winter drops below 10°C, its growth will be inhibited. The peak flowering period is around the Spring Festival; slightly lowering the temperature can prolong the viewing time, but it must not go below 13°C.

2. Water

In its place of origin, Phalaenopsis mostly grows on tree trunks, with its roots exposed to the air, able to absorb moisture from the humid air; air humidity should be kept at 70%. When cultivated artificially, the roots are buried in the growing medium, and if watered too much, the medium's aeration worsens, the fleshy roots rot, and the leaves turn yellow and fall off, leading to death in severe cases. The principle of watering: water when dry, stop when wet, and water thoroughly when you do. When the indoor air is dry, you can use a sprayer or spray bottle to mist the leaf surface, but note that during the flowering period you must not spray water mist onto the flowers, to avoid flowers and buds dropping.

3. Light

Phalaenopsis needs little light, about 1/3 to 1/2 of the light ordinary orchids need, and must never be exposed to strong direct sunlight. If grown on an indoor windowsill, use a window screen to block part of the sunlight: 80% shading in summer, 60% in autumn, and 40% in winter. Before and after the flowering period, appropriate light can promote blooming and make the flowers vivid and long-lasting.

4. Ventilation

Phalaenopsis needs fresh air, requiring a gentle airflow, and dislikes cold drafts and strong winds. During strong winds, it should be sheltered from the light, and if damaged by wind, it should be protected. An environment with a gentle breeze is best. To avoid wind damage, you can make a square frame of thin wooden boards, with a height of 30-40 cm. Lay a layer of wet sand inside the frame; this both blocks wind and increases humidity - two benefits in one.

5. Nutrition

For growing Phalaenopsis, sphagnum moss and peat moss are generally used as the growing medium. The fertilizing principle should be to fertilize less and use diluted fertilizer. During normal growth, apply a 2000-fold dilution of orchid-specific fertilizer as a root feeding, once every 2-3 weeks depending on growth. Before flowering, you can use a compound flower fertilizer based mainly on water-soluble high-phosphorus and high-potassium fertilizer at a 1000-2000-fold dilution, sprayed once about every 10 days. Stop fertilizing during the flowering period and in cooler seasons.

6. Repotting

It takes about 2 years from seedling to bloom. Mature Phalaenopsis should be repotted and given fresh medium after flowering each spring, otherwise dirt and moss tend to accumulate, and the medium easily decomposes and breeds pests and diseases. For potted Phalaenopsis, use a porous, breathable unglazed clay pot. When planting, the medium placed at the bottom of the pot should take up at least 1/2 of the pot's capacity, and part of the roots should be left exposed on the surface of the pot - never bury it completely and deeply, otherwise it will hinder breathing and growth.

Repotting a Phalaenopsis looks like a very simple task, but if done at the wrong time it can easily do more harm than good. We recommend repotting Phalaenopsis during its dormant period and early growth stage, best in spring and autumn, so it has little impact on the plant.