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How To Get An Oncidium Orchid To Bloom – 8 Tips Garden Guide

Orchids are one of the most interesting and diverse families in plant life. As they’re sometimes called, Oncidiums or air plants can be found growing on windowsills across America- even though their natural habitat is tropical countries like Vietnam!

These beautiful epiphytes love lower humidity levels, making them perfect for your homegrown collection; with minimal care, you’ll have an amazing green decoration that doesn’t require much maintenance.

Learning how to get an Oncidium Orchid to bloom is quite easy and can be done by following certain simple tips.

Oncidium orchids are a type of orchid that is native to Central and South America. These are sympodial orchids which means they grow from a single stem.

The stem will branch out and produce leaves and flowers at the end of each branch. These beautiful flowers come in various colors, including yellow, pink, white, and purple.

Oncidium orchids are known for their large, showy blooms, measuring up to 8 inches across! Like most orchids, Oncidiums prefer high humidity levels and indirect light. A well-lit, east-facing window is perfect.

Some oncidiums are more flouncy than others, with their large flower petals giving them an appearance that brings to mind full yellow skirts.

However, some varieties do not have this feature and can be mistaken for another plant species altogether if it’s not recognized beforehand by looking closely at the labellum – which is where we’ll find the identifying characteristic!

How To Get An Oncidium Orchid To Bloom
Oncidium orchid help! – via Reddit

How To Get An Oncidium Orchid To Bloom

If you’re an oncidium orchid enthusiast, then you know that getting these beautiful flowers to bloom can be quite a challenge. But with a little patience and the right care, it is possible to enjoy a gorgeous display of oncidium blooms. Here are some tips on how to get an Oncidium Orchid to bloom: 

Proper Lights

First, make sure that your oncidium orchid is getting enough light. These plants need bright, indirect sunlight to bloom. If you’re not sure if your plant is getting enough light, try moving it to a brighter spot.

Artificial lights are a great way to get the beautiful flowers you desire. They can be less intimidating than natural light and produce fantastic results!

Proper Air Circulation

Oncidiums also need good air circulation. Be sure to keep the leaves of your plant clear of any obstructions, and make sure that the air around your plant is circulating well.

If you notice black or brown spots on the leaves of your Oncidium orchid, don’t be alarmed. Bacteria likely cause these.

To help reduce spotting: increase oxygen levels around them through increased ventilation; keep away from lightings that could dry out their roots – these include windowsills near any outside doorways where natural sunlight enters during summer months. 

Right Temperature

Orchids love moderate temperatures- between 65 and 90 degrees Fahrenheit is ideal. Try to avoid exposing your orchid to sudden changes in temperature, as this can shock the plant and cause it to stop blooming. Oncidiums like to stay at around 60 degrees Fahrenheit (15 Celsius) in the winter.

If you want your plants happy and healthy, it is best not only for them but also for yourself that their temperatures remain in this range.

Make sure they have 10-degree drops between nighttime lows & daytime highs; these will help keep water draining properly while still giving off enough warmth through artificial lighting or window light throughout most days of playtime!

Good Soil

Oncidiums prefer loose, well-draining soil. You can buy a potting mix specifically designed for orchids, or you can make your mix by combining potting soil with perlite or sand. 

How To Get An Oncidium Orchid To Bloom 2
Looking for some care tips for my new Oncidium alliance – via Reddit

Proper Humidity Levels

Oncidiums need a humid environment to grow well. For home growers, ensure that the level of humidity in your house is between 40-50%. To help increase the humidity around your oncidium orchid, you can mist the leaves of your plant daily.

You can also place a humidity tray under your plant. If you want them outside, year-round, keep an eye on those levels and make sure they don’t get too low or high, as high humidity levels will promote mould growth inside homes!

Proper Watering

Make sure your orchid is getting enough water. Oncidiums need to be kept moist but not wet. Be sure to wait until the soil has dried out a bit before watering again.

When watering your orchid, be sure to thoroughly soak the potting mix and then allow it to drain completely. These plants are susceptible to root rot, so it’s important not to keep them too wet.

Proper Fertilization

Give your orchid some fertilizer. An orchid food specifically designed for blooming plants will work best.

Fertilize your orchid every other week using a diluted solution of a balanced fertilizer such as 20-20-20 having a balanced ratio of phosphorous, nitrogen, and potassium that works wonders for fertilizing plants during all stages of growth.

Follow the directions on the package, and fertilize your orchid regularly for best results.

It is important to dilute fertilizer before using it on plants. Watch the leaf tips for any signs of browning, which may indicate that too much has been applied or burning caused by salts in your potting soil! Allow adequate freshwater drainage outside an inch away (or more) all year round.

To not have salty residue build up between watering sessions, make sure you remove excess moisture through flooding rather than pour further onto already fairly moist surfaces.


Repot your orchid every two to three years. When repotting, be sure to use a pot that is only one size larger than the current pot. Oncidiums have a shallow root system, so they don’t need much space. Be sure to use a well-draining potting mix. You can either repot in the spring or fall.

It is best to wait until your plant has finished blooming before repotting it. This will help reduce stress on the plant. When you do repot, be sure to remove the old potting mix from around the roots gently.

Inspect the roots for any signs of rotting. When potting a plant, it’s important to carefully clean off the roots of the old mix and cut any bad ones.

You may also have broken some good ones when repotting – this is inevitable, so don’t worry about those!

Just make sure you’re only removing brown or mushy/papery colored plants; otherwise, leave them in their current pots since they’ll develop newer growth towards the front side while yours moves back away from the light source over time (about 1-2 years).

With these tips in mind, you should be able to get your oncidium orchid to bloom successfully!

Final Remarks

Oncidium orchids are beautiful plants that can be a great addition to any home. While oncidium orchids are fairly easy to care for, they can be finicky when it comes to blooming. Just provide them with the proper care, and you should see them bloom in no time!

They are exquisite plants that both novice and experienced gardeners can enjoy. If you want your Oncidium Orchid to bloom, follow the above guide. Now that you know how to get an Oncidium Orchid to bloom, you can enjoy the beautiful flowers that these plants produce!