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The Christ's thorn originally comes from Madagascar and is a very robust and easy-care plant. Dry heating air does not bother Euphorbia milii at all, but it is a poisonous plant. If you discover that the plant is suddenly developing yellow leaves, you should act because then something has gone wrong in the care.

Leaf discoloration warning sign

Wrong location for the Euphorbia

Most often, the wrong location is responsible for yellow foliage. The first measure is of course a change of position. A south-facing window, where the plant is as bright and warm as possible, is ideal.
If it's summer, you can also put the Euphorbia in the garden. It is important that there is one here rainproof there is space. Being outdoors not only ensures greater resilience, but also better nutrient uptake.

tip: If you place your Euphorbia in an airy, very bright place, discoloration of the foliage will quickly become a thing of the past.

demands on the location

  • South window with lots of sun is well suited
  • an airy location is important
  • in summer the plant may go outside

If your euphorbia no longer feels well, it will react by turning the foliage yellow. Now you must act to stop the loss of hands. Quickly find an airy, warm location, in summer also on the balcony. Here your plant will recover quickly and leaf loss may still be preventable.

loss of leaves

causes and measures

When the plant sheds its leaves, there are different reasons. The good news is that most issues can be fixed. You should attach great importance to regular watering, because that is the main thing when the foliage stops wanting.


Christ thorn needs regularly water and heat. If you occasionally forget to water or if your plant's location is too dark and cool, it can react with a complete shedding of leaves. If a lack of irrigation water was responsible, you should look for a cooler location and slowly increase the amount of water. You may be able to initiate flowering this way, as this follows a dry dormancy in the plant. If you water too often, root rot can quickly develop, which then makes it susceptible to disease.


A warm location is always important, except during the dry dormant period. During the rest period, however, a cooler location is required, otherwise leaf loss will also occur. If the temperatures are too high, it is just as damaging as a cool environment. The location should not get warmer than 30 °C. During the dry period, the temperature must not be lower than 15 °C.

Repot - proceed carefully

The Euphorbia is quite undemanding as far as its pot is concerned, all of them will do three years to repot. If you repot more frequently, the plant may react by shedding its leaves. This happens in particular when the plant has been repotted in an environment that is too cold or when there is a root injury.
Make sure the Euphorbia's new vessel is no more than two centimeters larger (diameter) than before. You should also choose the right time when repotting. When the plant comes out of hibernation (end of March) it has come. Never repot when the plant is dormant, and not in the summer when it is already too hot.

Use the right substrate

Not only the location is important for the thorn of Christ, but also the right substrate. The plant requires some nutrients that it is most likely to get off cactus soil or potting soil can relate.
In order to always maintain the nutrient content of Euphorbia milii, you should regularly during the period from May to October liquid fertilizer give. In this way you ensure a strong, healthy plant that develops yellow leaves far less often and instead convinces you with its gracefulness.

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