What Is The Best Room Temperature For Orchids? (Tolerance)

There are no trifles in orchid care. The environment is of particular importance. One of them is the temperature regime. If it is violated, the plants will at least not bloom, and in an unfavorable environment, they may even die. We will tell you what is the best room temperature for orchids and how to provide the necessary heat at different times of the year in our article.

orchid temperature tolerance in celsius

When growing exotic plants in indoor conditions, they try to create conditions as close as possible to those that are characteristic of their natural origin. Orchids grow in geographic areas with warm and humid climates, without sudden changes in temperature at any time of the year. For example, the most common botanical genus, Phalaenopsis is found in geographic regions of the Himalayas, India, Burma of Southeast Asia, Malaysia, the Philippines, Indonesia, New Guinea, and Australia. These regions are characterized by positive temperatures throughout the entire calendar year. Indicators change insignificantly within +20⁰– +28⁰.

Uniform heating for an orchid as a houseplant can only be created in a greenhouse. At home, the intervals of the thermal regime at different times of the year are difficult to keep within strict limits. But, thanks to modern breeding, there are many varieties and hybrids that are successfully grown in our climate. The growing range has expanded +15⁰ – +20⁰ in winter, +20⁰– +32⁰ in summer. More accurate indicators are considered in connection with the characteristics of each type and variety of orchids.

The successful cultivation and the duration of flowering depend on how accurately the temperature regime is maintained during different periods of the growing season. Many hybrids can flower twice a year, and the ability to hold buds lasts at least two months. Often, the total flowering period is about ten months a year, provided that the heat is optimal.

• The maximum temperatures in which the orchid can survive indoors is from +12⁰ to +42⁰.
• If the heat is less than plus 12 degrees, the plant will freeze,   and at +42⁰ and above, it will die from the heat due to heatstroke.

Many orchids owners are worried about How To Revive An Orchid Without Leaves?

what is the best room temperature for orchids? on basis of Season.

Heat is one of the most important factors for the full-fledged photosynthesis of plants, that is, the process in which the maximum possible number of new plant cells of leaves and flower stems is formed. Under conditions of insufficient temperature regime, the sap flow slows down, respectively, the formation of young tissues is much slower or does not occur at all. Thus, the thermal regime has a direct impact on the vegetative development of plants. This explains the periods of intense growth and dormancy in orchids. Sometimes they are pronounced, but often smoothly, almost imperceptibly, they pass from one stage to another. These phenomena are directly related to the seasonal conditions of plant maintenance.

Winter orchid temperature tolerance in celsius

At this time of the year, at home, the minimum heat required by orchids is possible. The advantage of this period is that the heating mode has already been established and is kept within the range +18⁰– +22⁰. The advantage of artificial heating is temperature uniformity at any time of the day. Such an environment has a beneficial effect on the general condition of the plant, which reduces the risk of disease and pest damage.

Most types and varieties of orchids are characterized by an important feature necessary for the formation of flower organs – shoots and buds:

• The difference between night and day temperature. Without this, flowering will not take place.
• Regardless of the time of year, to get a flowering plant, you need to provide a difference in thermometer readings of at least five degrees. For example, Phalaenopsis often blooms at the end of winter, if the appropriate temperature regime has been observed for the previous three months.

Orchids temperature chart in winter

For different species, the following conditions are recommended in winter:

Name	Day temperature in celsius	Night temperature in celsius	Extremely low in celsius
Phalaenopsis	+18 0 – +23 0	+15 0 – +18 0	+12 0
Dendrobium	+20 0 – +21 0	+15 0 – +16 0	+5 0
Cattleya	+18 0 – +22 0	+12 0 – +15 0	Below +8 0
Cymbidium	+15 0 – +20 0	+10 0 – +15 0

Tip # 1. Pay attention! The table shows the average values. They can vary depending on the variety. Some hybrids undergo a complex interspecific crossing, borrow the properties of both parents, or form their own. When creating a temperature regime, it is important to be guided by the individual requirements of the orchid.

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Spring orchid temperature tolerance

The end of winter and the first spring months are the most common orchid flowering times. During this season, daylight hours increase, and the difference in daily temperature temporarily loses its relevance. On the contrary, during flowering, it is important to prevent sudden jumps in the cold in the room, which is sometimes observed when the centralized heating is turned off. Such changes can cause wilting of flowers and unopened buds.

What temperature is too cold for orchids?

It is better to keep warm at least +20⁰+ – +25⁰. Where as +5⁰+ – +12⁰ is mostly too cold for orchids.

In March, early April, many orchids after flowering rest from two weeks to a month. During this period, it is better to maintain uniform heat, without sudden fluctuations.

In late April, early May, the orchid enters a period of active growth, due to the fact that the duration of natural light and heating increases. At this time, there is an intensive growth of the groundmass young leaves are formed, which quickly increase in size. These processes require enormous resources from the plant. Their receipt is possible only with the necessary heat and light.

• The average daily temperature is +23⁰ – +25⁰.

Important! 2-3 months pass from the appearance of young leaves to the moment when they gain strength.

Summer orchid temperature tolerance

In hot weather, it is necessary to provide orchids with heatstroke protection. It is worth making sure that the plants do not end up in conditions that exceed their biological capabilities. Most species suffer in heat above +32 ⁰, but there are those that can withstand up to +42⁰, for example, dendrobiums. But this by no means means that they need to be tested with extreme extremes.

what temperature is too hot for orchids?

If the temperature is at +42⁰ and above, the orchid will die from the heat due to heatstroke.

As soon as the orchid has a flower arrow, it needs to provide a drop-in heat. The difference between the daytime temperature and that which comes from evening to morning should be at least five degrees, and preferably 27⁰. For example, during the day +27⁰, and at night +22⁰.

You don’t have to make much effort if you can take the orchid out into the garden or on an open balcony. The main thing is to place it in a cozy, draft-free place.

This regime must be observed until the peduncle develops in full force, that is, until the moment when the first bud opens.

Due to high temperature and watering orchids, roots face problems and you need to fix Unhealthy Orchid Roots.

Autumn best room temperature for orchids

For each type and variety of orchids, the flowering time depends on the growing conditions. For many, this period falls in the fall. Most of the trouble can be caused by the transitional heating period when the temperature in the house is colder and the centralized heating has not yet been turned on. Then the plant needs heating. This is especially important if there is a peduncle that is in the stage of intensive growth. It is important to maintain a temperature of at least +22⁰. And besides this, provide additional lighting.