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Guide to care and cultivation of eucalyptus in the garden

Today we have to talk about a tree, rather, a large tree that we can see on many walks in the city or directly in our garden, everything is a matter of getting down to work. Although eucalyptus is a tree that practically grows by itself, we are going to give you some tips related to its cultivation and make sure you grow up happy and content. 


The eucalyptus is a genus of trees belonging to the family of miráceas. This family includes trees or shrubs that, like eucalyptus, have a good amount of extractable essential oils, forming 130 genera and 2,900 species distributed both in Europe and in tropical regions. However, of all that geographical distribution, the favorite country for eucalyptus is Australia .

In fact, it will sound to you that koalas also come from Australia and eat eucalyptus (about 1 kg a day). Later we will also talk about the therapeutic properties of eucalyptus, which you will surely know where the shots go, right? Eucalyptus oil, peppermint and eucalyptus candies, etc.



There cannot be a sunnier environment than the Australian climate. Therefore, do not feel sorry to put the eucalyptus in full sun. In fact, when the tree reaches its height in adulthood, few trees will have in the garden as big as eucalyptus spp. or similar.

The ideal temperature is between 20 and 30º C and corresponds to hot or tropical climates. However, it has a medium resistance to cold, around -5ºC, but it will depend mainly on the age of the crop. The most resistant to cold are the snow eucalyptus trees  that resist frosts of -20 ºC. In terms of resistance to cold, it is important to select the variety that best suits the climate, because we may have future problems if our climate is quite cold or prone to frost.


Few things will have to be taken into account when planting a eucalyptus except one, and that is the pH of the soil. Regarding the structure, it is indifferent that it is clayey, silty or sandy, but if the limestone content of the soil influences it. The pH is usually around 5.5 and 6.5 and you will have to correct or prepare the soil if your soil is alkaline. The contributions of organic matter such as compost acidify the soil, as well as some decomposed green manures .


Although eucalyptus spp. It is a tree resistant to everything, it does not do very well during prolonged dry spells. Neither is excess water so medium watering is the key.

Although the fertilizer is important, this tree has a very powerful development of its root system and it will only be necessary to fertilize in the first years of life. A moderate amount of compost can be added around the trunk that will gradually be absorbed through the irrigation water.


If it is true that lately there is an increase in complaints regarding the cultivation of eucalyptus by ecologists in defense of other plants that are affected by eucalyptus. It is something like the zebra mussel with the rest of the fauna in rivers or channels. The cause is due to the following statements.

  • Eucalyptus is not a native species
  • Has negative allelopathic effects
  • It is a species that absorbs many nutrients within its space.

It is considered an invasive species because biologically it has evolved better than other plants, that is clear. It has mechanisms that allow it to survive in conditions where other plants would not. On the other hand, its roots produce negative allelopathies that we are going to tell you exactly what they are.


An allelopathy is a biological phenomenon by which an organism secretes biochemical substances that can be harmful or positive for the surrounding organisms. In the case of eucalyptus, the substances it produces are negative and reduce the development of other plants. That is why it will be difficult for you to see plants grow around the trunk of a eucalyptus, or if you see them they are also very resistant plants.

All these negative comments about the cultivation of eucalyptus can be qualified. Today, the eucalyptus wood industry is quite important in the world and even more so that of essential oils.

In these cases they are usually grown in fenced spaces with a control of their development so it should not affect the external flora of that land. On the other hand, if you have a eucalyptus in your garden, it is not a problem for the rest of the plants, nor will it become an invasive species in the future.

On the other hand, in Spain there is a continuous reforestation of forests using eucalyptus as the main tree, especially in Galicia. This can be assumed as a problem because it has been shown that under these conditions and in very extensive and poorly controlled crops there is a modification of the ecosystem.

As easy as thinking that if through these allelopathies the flora is reduced, the fauna also because the diet is reduced. On the other hand, the eucalyptus together with the poplar has a very high yield in terms of wood production, so again we find a clash between the economy and the ecology.


From the leaves of Equalyptus spp. essential oils that have medicinal properties are extracted . Its oil is widely used for muscle problems and many calming products have eucalyptus as an active ingredient (in fact it smells a lot). In turn, it is also widely used as a decongestant and for the treatment of respiratory infections.

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