Why does the orchid turn yellow
Orchids are fairly demanding on the conditions created for them, many factors affect the growth and development of the flower. There are a number of reasons why the orchid turns yellow. You can save flower stalks and prevent the spread of infection further, the main thing is to start treatment of the plant in a timely manner.
Causes of yellowing orchids
Without good lighting, a home orchid will be unable to bloom. The lack of lighting is manifested by a pallor of the upper roots, it is easily eliminated - rearrange the phalaenopsis in a more illuminated place. If dark spots are found, then the plant received a sunburn due to direct sunlight. Cut the affected area at the very base, and rearrange the orchid itself in the shade.
- Poor watering quality is the first reason you feel unwell. Hard water filled with excess salts and metals should not be used. If the cause of the disease state of the plant is this, then the very lowest leaves turn yellow first in the orchid, and all subsequent ones are covered with yellow spots. If the plant is at rest, urgently need to be transplanted into a new substrate. If flowering is in full swing and transplantation is not possible, water the plant with diluted 50/50 distilled water and ordinary sediment from the crown to the base.
- Lack of moisture - regularly check the soil, if it dries, put the flower pot in a large container of water for 30 minutes, then let the water drain completely and return the phalaenopsis to its original place.
- Excessive watering will lead to rotting of the roots, their lethargy, soaking spots will appear and soon the leaf will fall off. If an overflow has occurred and the root rots, then the orchid should be transplanted into a new substrate, while removing the damaged areas, but at the beginning wait for it to fade.
If a previously healthy home orchid is suddenly yellowed and dried up, the reason may be an excess of fertilizer. When the stem and flowers wither, and the leaf falls, phalaenopsis can be saved. To do this, rinse the substrate or transplant a flower, it is impossible to feed the next few months, after that - only with diluted fertilizer.
If only the tips or lower leaves are yellowed and wrinkled, then the orchid suffers from an excess of calcium. Change the substrate. In this case, for a while, the need for feeding disappears. If the orchid turns yellow on top, veins appear on the leaves and eventually crumble, then the reason for the lack of potassium is to use special fertilizer.
The orchid dries from fungal infections, they occur with frequent watering and affect the root system and trunk of the flower. If decay is not stopped in time, then it will affect the leaves, causing them to turn yellow and fall. It is necessary to immediately take measures - replace the substrate, cut off the affected areas and treat phalaenopsis with an antifungal drug. Use fungicides for prophylaxis.
Due to bacterial infections, the leaves turn yellow sharply, darken over time, become lethargic and wrinkled, weeping spots with an unpleasant smell of rot appear. Isolate the plant, trim the affected areas and treat the sections with iodine. Only after treatment with an antifungal drug can the flowerpot be returned to its original place.
Most of all, orchids are loved by ticks and white-winged moth. Due to mite damage, the roots and trunk of the plant receive less nutrients and moisture, the leaves react first, they turn yellow and lose their elasticity. To save the flower, treat it with a special preparation and after passing the full course of spraying, transplant it into a new substrate. When whiteflies appear, the flower covers a white fine-grained coating, the leaves quickly wither and fall, the peduncles can dry out. To restore the leaves, use a soap solution, it will remove plaque, then spray with a special solution of pests. The procedure is repeated for several consecutive weeks until complete cure.
Old leaves may turn yellow and fall
The leaves may turn yellow and fall off due to old age, but in their place, new, young, light green leaves will surely grow. Usually the process begins with the lowest leaves, gradually rising up the trunk of the flower. There are also hybrids of phalaenopsis that necessarily drop foliage during flowering.
If the orchid has dried up and has a painful appearance, adverse growth conditions may also be the cause.
When the plant has grown and most of the roots are already outside the pot, or squeezed in it, the roots are deformed and dry, the penetration of moisture and nutrients is difficult, as a result, the leaves turn yellow and begin to fall down. Transplant phalaenopsis into a pot of a suitable size, if necessary, dividing it, try not to damage the buds and peduncles. After transplanting, the plant will quickly return to normal.
Orchids are tender and moody, sensitive to any changes. Changing lighting and temperature, or moving to a new place are stressful. If the leaves are yellow and opal after the above changes, one wonders why the flower withered. The flower should get used to stressful situations gradually - rearrange the pot to a new place for a couple of hours, then return it back.
The homeland of the flower is the tropics, hence the love for the humid environment. Dry air will provoke yellowness of leaves, dryness at the tips and falling off. To revitalize it, provide the desired level of humidity with a humidifier or frequent spraying, and the flower will quickly return to normal. If the soil is dry, rinse it under running water.
- good substrate;
- a lighted place without direct sunlight;
- watering as the soil dries up, settled water at room temperature;
- a suitable pot size;
- fertilizers according to the instructions;
- timely treatment of infections and getting rid of pests.
If the rules of care are followed, but the orchid dries up anyway, try adopting the following tips:
- Alternate the method of watering - immerse in a large container of water, and next time water from above, without falling on the lower leaves and trunk.
- Spray the flower regularly with warm water.
- If the roots are bright green - there is enough moisture in the substrate, if it is brightened, they become silver - urgently water, the soil dries.
- After flowering, do not cut the peduncles under the root, if they are not dry - leave them alone, after a while carefully trim dry areas.
- Use special soil for orchids, it contains pieces of bark.
- Cover moss with an earthen lump, this will protect it from drying out and retain moisture inside the pot.
- The orchid is transplanted only during dormancy, until a bulb appears, and the flower stalk withers.
If the phalaenopsis does not bloom for a long time, place it in a dark room, later returning it to its place. A contrast shower also helps a lot - at first it’s good warm water, then cool. Soon she will please you with a young arrow.
Whatever the cause of the yellowness on the leaves, this is a cause for concern and an alarm. If you do not respond on time, the plant will die. Provide the orchid with proper care, and it will surely please you with a long and magnificent flowering.