Yellow Oncidium Orchid Care: Watering, Temperature, Potting

The small yellow oncidium hybrid is famous for its rapid growth and abundant flowering. Graceful erect peduncles rise above the lanceolate leaves. The modest size of the flowers is compensated by their abundance. Each peduncle has 10 to 25 buds. They bloom at the same time, turning into yellow flowers with a bright red spot at the base of the lip. Blooming, creating a festive atmosphere, lasts at least a month. Cut flowers live 1.2–2 weeks.

Yellow Oncidium Orchid Care


Main genus : Oncidium
The soilLightweight, moisture and breathable with the addition of perlite or a special substrate for orchids.
The sizefrom 30 to 150 cm
Flowering timeJanuary to December
Possible colorsyellow
LightingMany // West, South orientation, may require several hours of direct sunlight
WateringMedium // Watering abundantly 2-3 times a week
Difficulty leavingMedium // Generally unpretentious, may have special requirements for this type
Air humidityMedium // Moderate humidity (at least 35%, normal outdoor humidity in the shade)
Fertilization frequencyMedium // Fertilize only during the period of active growth (at least during the rest period)

yellow oncidium orchid care

Unlike other orchids, yellow oncidium does not need constant complex care, it is enough to immediately create suitable conditions and periodically pay attention to the flower, which makes it convenient for busy people. There are so many oncidium orchid varieties and mostly they have the same care and protection.

How to choose an oncidium orchid at the time of purchase?

The plant should have green (not too dark, but not too light leaves), not show signs of rot or drying out. Moreover, he must have at least three mature pseudobulbs.

The roots of a healthy orchid are light and can be of different shapes. The soil should be moist – not dry, but not too flooded.

It is better to buy a small flower – it will definitely turn out to be young, and will grow over time.

Temperature regime for Oncidium Orchid

Depends on the specific species, since they can be divided into 3 groups:

  1. Heat-loving: 25-30 degrees in summer and 15-18 in winter.
  2. Cold-loving: the maximum allowable temperature in summer is 22 degrees, in winter – 7-10.
  3. Preferred mean values: 18-22 in summer and 12-15 in winter.

Regardless of the type, the daily difference should be 3-5 degrees.

How much light do Oncidium orchids need?

How Much Light Do Oncidium Orchids Need

Loves sunlight, but does not tolerate direct scorching rays. With insufficient lighting, the leaves darken, with its excessive abundance, they brighten and become covered with spots – this way you can determine whether the flower is in comfortable conditions.

With a stable lack of light, it stops blooming, even if other conditions are ideal.


Prefers medium values, but in summer it needs regular spraying of the leaves. But if the plant grows in a cold room, then high humidity is unacceptable, otherwise, it will get sick.

How do you water an Oncidium orchid?

Needs frequent (every few days) watering, especially during growth. The water should be at room temperature or warmer. During the formation of a new pseudobulb, watering is temporarily stopped.

Check out visually in the video below with the conditions for keeping an orchid (light, watering, substrate)

How Do Orchids Reproduce? read out the complete guide.

How often do Oncidium orchids bloom?

It blooms in late summer or early autumn (depending on the variety), some species are able to do this several times a year (under ideal conditions). Flowers can be of different sizes and colors – yellow, pink, multi-colored and others, it depends on the variety.

Oncidium Orchids Potting mix

Prefers a mixture of pine bark, charcoal, peat, and sphagnum moss. You can also buy a special soil mixture for orchids, choose the softest option.

If the soil is dense, the roots will begin to fade.

Pot Selection for oncidium orchids

Unlike most other members of the orchid genus, it does not need a transparent pot, which gives the roots access to sunlight.

It is better to take a ceramic container, but a plastic one will do. The form must be chosen depending on the root system itself – it can grow in different ways, so there is no universal requirement. It is important that the roots are not too crowded.

Fertilizers and feeding for oncidium

Fertilizers for orchids are used for feeding, but the dose recommended on the package should be halved. Fertilize once a month, except during the hibernation period.

Transfering Oncidium Orchids

Regular transplantation is not required, it is needed only in a few cases:

  • the roots have grown too much, a larger pot is needed;
  • due to stagnant water, the roots have rotted;
  • too old substrate, the need to update it.

The course of action:

  1. Place drainage (for example, stones or expanded clay) at the bottom of the new pot.
  2. Pour the earth.
  3. Place the plant in a pot – closer to one wall, turning the old pseudobulbs towards it. Thus, young shoots will grow in the other direction, where free space is left.

You need to know that a freshly planted plant should be immersed in the ground only by its roots; you should not bury it deeper.

How do you propagate Oncidium orchids?

There are two ways to reproduce or propagate oncidium:

  • Division, which is possible only if the mother plant has more than six pseudobulbs (if there are less than three, then the flower will not survive). First, you need to disinfect the knife used to make the incision, and after the procedure, you need to lubricate the incisions with charcoal. After transplanting, you cannot water any of the divisible plants for about ten days, otherwise the cut site may rot.
  • Pseudobulb deposition , which is carried out if an additional bush has formed on the plant. As in the first case, you need to separate the root system and the aerial part of the orchid, forming two independent plants.

Oncidium Diseases and pests

Mealy worm on an oncidium leaf Oncidium is susceptible to pests known to all flower growers – scale insects, spider mites, mealy worms. You can detect their presence by bloom or cobwebs on the leaves, their yellowing and wilting, the formation of yellow or black spots.

In this case, you need to carefully treat all the leaves with soapy water, and then rinse the flower in the shower (but you cannot do this during the flowering period). The upper part of the soil should be changed – in case the pests got there too.

At the end of the procedure, you can spray the orchid with any of the special pest control agents.

Rot can also form on the oncidium. It is necessary to cut off the damaged areas and disinfect these places, and then transfer the flower to heat.

You may also like Types of yellow orchids Care, Transplant, and Growing.

Potential problems with growing and care

What causes orchid root rot?

If the roots rot, then you need to get rid of the damaged areas as soon as possible, otherwise, recovery is impossible. Places of cuts must be treated with antiseptic or charcoal. After that, the orchid must be transplanted into the new soil.

It is not necessary to water it too abundantly after transplanting, and fertilizers should also not be used. If possible, all unnecessary should be cut off from the aerial part and shoots should be planted, then the flower will have more resources for root restoration.

Shrinking pseudo bulbs

Shrinkage of the pseudobulb can be due to a lack of moisture or a problem (pests or rot), or it can occur when a young shoot is formed that feeds on the mother plant. In the first case, the problem disappears after eliminating its cause, in the second, it goes away by itself when the shoot takes root.

Why are my Oncidium leaves turning yellow?

Leaves may begin to turn yellow and wilt, or brown spots form on them. In both cases, this is a sign that a pest has wound up in the flower. Until you get rid of it, the orchid will not return to a healthy look.

Oncidium is suitable for those who love lush flowering plants but do not have time for thorough care. If you create and maintain ideal conditions by periodically watering the flower and occasionally fertilizing it, you can enjoy its bloom every year.

I am an avid plant enthusiast and horticulture aficionado with a deep passion for houseplants. With years of nurturing green companions, my expertise in caring for indoor foliage is well-rooted. Through my journey, I've cultivated insights into optimal plant care, propagation techniques, and creating vibrant indoor ecosystems. Join me as we explore the verdant world of houseplants together. Let's turn your living space into a thriving oasis of botanical beauty. Connect with me on and Facebook and explore more at Houseplantspro. 🌿🪴

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