Many people who buy olive trees, lemon trees or other citrus plants ask the same question as autumn approaches:
How warm do plants really need to be to survive the winter?
The answer is that most Mediterranean plants don't like to be particularly hot. However, they do want a consistent temperature, plenty of light and protection from frost.
This is also why the choice of heating system can make a big difference in greenhouses, orangeries and conservatories.
Recommended temperature for common Mediterranean plants
| Plant | Recommended winter temperature |
|---|---|
| Olive tree | 5–10°C |
| Lemon tree | 5–12°C |
| Orange tree | 5–12°C |
| Fig tree | 0–10°C |
| Laurel tree | 5–10°C |
| Palm | 5–15°C depending on variety |
The goal is rarely to create summer temperatures in the middle of winter. Instead, it is about keeping the plants frost-free and creating a stable climate.
Frost is rarely the only problem
Many people focus entirely on the outdoor temperature.
In reality, it is often the combination of cold, humidity and large temperature differences that create problems.
When temperatures fluctuate greatly between day and night, plants are exposed to unnecessary stress. Therefore, an even temperature is often more important than trying to keep it very warm.
Warm air in the ceiling doesn't help plants
Many traditional heating systems primarily heat the air.
The problem is that warm air rises.
In a greenhouse or orangery, this often means that the warmest air collects at the ceiling while plants, pots and people are located significantly further down.
Infrared heat works differently.
Instead of heating the air, plants, pots, floors and other surfaces are heated directly, which means the heat ends up where it is most useful.
Dark Heater is perfect for greenhouses and orangeries
In environments where light is important, Dark Heater has become a popular choice.
It can be mounted high up without obscuring glass areas or plants while delivering pleasant infrared heat.
For many greenhouse owners, this means they can extend the season and create better conditions for both plants and people.
Dark Heater installed in a greenhouse with olive trees and citrus plants.
Infrared panels work very well in conservatories and winter gardens
In conservatories and winter gardens, the space is often used for both plants and people.
Here, long-wave infrared panels are often a very good option because they heat floors, walls, furniture and pots in an even and pleasant way.
For larger areas, Infracenters has
The result is a better climate where both people and plants can thrive during the colder months of the year.
That's why many plant owners choose Infracenter
Since 2014, Infracenter has helped customers create comfortable environments in everything from greenhouses and orangeries to conservatories and winter gardens.
We know that the right temperature is only part of the solution. Just as important is how the heat is distributed and how the environment works for both people and plants.
That's why more and more people are choosing Dark Heaters in greenhouses and our infrared panels in conservatories and orangeries where comfort, light penetration and energy efficiency are important factors.
FAQ
Can olive trees withstand frost?
Some olive trees can withstand short-term light frost, but for safe overwintering, a frost-free environment is recommended.
How warm should a lemon tree be in winter?
Most lemon trees thrive best at around 5–12°C during the winter months.
Is infrared heat good for olive trees and citrus plants?
Yes, infrared heating can contribute to a more even climate because the heat is stored in plants, pots and other surfaces instead of just in the air.
Should I choose Dark Heater or infrared panel?
In greenhouses and orangeries, Dark Heater is often a very good choice. In conservatories and winter gardens, infrared panels are often the most popular option.