Is the Crown of Thorns (Euphorbia milii) Poisonous? Causes of Yellow Leaves and How to Fix Them

Green plants have always been common in our lives, and every variety has its own fans. The Crown of Thorns (Euphorbia milii) is also quite distinctive. As a shrub native to the tropics, the Crown of Thorns has a lot of character both when it is not blooming and when it is in flower, with strong ornamental value, and unlike other green plants, the thorns on its body are also very eye-catching. For beginners growing it, you must have many questions. For example, is the Crown of Thorns poisonous? What to do when the leaves turn yellow, and so on. Let's take a look together!

1. Is the Crown of Thorns poisonous?

The Crown of Thorns is poisonous. Unlike other plants, it has many thorns on its exterior, and the white milky sap in its stems and leaves is toxic. If the human body comes into direct contact with it, it will cause irritation. For more sensitive groups, touching it may cause redness, swelling, stinging and allergic reactions right away, so everyone must be sure to avoid this. Even more so, you must not be careless with children. Many children, being playful, will touch the Crown of Thorns, and if they accidentally eat it, dangerous symptoms such as nausea and diarrhea may occur, and if it accidentally gets into the eyes, severe cases can cause blindness.

There are also related research investigations that show that the harmful substances in the sap of the Crown of Thorns are quite harmful to human eyes, so during cultivation, everyone should try not to place it somewhere children can reach.

2. What to do when the Crown of Thorns leaves turn yellow?

Actually, the problem of green plants developing yellow leaves is very common, but you also need to distinguish why they are causing this situation:

1. Overwatering

The Crown of Thorns is actually fairly tolerant of drought, after all, it is a tropical plant, but once the amount of watering is too much, it will definitely harm its root system. In this situation, we should appropriately reduce the frequency and amount of watering.

2. Stuffy, muggy air

Everyone may not quite understand the stuffy, muggy air issue, because before you bought the Crown of Thorns and brought it home, it was always grown in a place with very good ventilation, so it is recommended that after buying it and taking it home, you also continue to place it in a non-enclosed living room or on a balcony, and do not leave it long-term in indoor rooms such as bedrooms and dining rooms.

3. Temperature too low

Late autumn is the season when the Crown of Thorns gradually transitions, and winter is precisely its dormant period. At this time, yellow leaves on the Crown of Thorns are a normal phenomenon, so everyone should not worry too much. When spring arrives, it will slowly grow new green leaves along with the weather.

That is all for today's summary and compilation by Tuliu.com on related questions about the Crown of Thorns. There are many friends growing the Crown of Thorns now, but you may not have paid much attention to the above issues. I hope this article can be of some help to your cultivation.