Apart from the poinsettia, there are a number of species of Euphorbia that are commonly grown. The crown of thorns (Euphorbia milii) is the most commonly grown succulent Euphorbia. It is also known as the Christ plant. Though it once went under the Latin name of Euphorbia splendens, it is now known as E. milii. Though some say this may not be a true succulent, it nonetheless behaves as one. So for that reason we can consider it as such.

Under good growing conditions, this plant can grow to be a dense shrub about three feet in height. The thing it is most noted for is the sharp spines about an inch long. They can usually be found close to the growing tips of the dark brown stems. The crown of thorns has leaves that usually appear in clusters. They are bright green, about two inches long. Don’t be alarmed if these emerge, only to die and drop off some months later. This is normal activity for the crown of thorns.

Crown of thorns is also known for its lovely blossom-like bracts, which appear in groups of two to six. On two-inch long stalks, these open near the ends of the stems that are actively growing. These are kidney-shaped, and are usually yellow or vivid red. However, there is also a variety with pink bracts.

As with the poinsettia, the actual blossoms are quite tiny, and are surrounded by these colorful bracts. Normally, flowering occurs from the early spring months until late summer or early fall. However, under good growing conditions, crown of thorns can bloom continuously. The flower stalks have a sticky substance that can get on the hands when we handle the plant.

In addition to the species plant, there are several varieties and kinds of crown of thorns available. There is a somewhat dwarf one. It features softer spines. Its reddish bracts are smaller than those of the species. In contrast, there is a taller one that reaches six feet in height. Its foliage tends to be oblong in shape.

Like succulents, crown of thorns prefers full sun and warm growing conditions. Try to keep the temperature above 55 degrees Fahrenheit. Otherwise, it may defoliate.

When you water this plant, be sure to get the potting soil really moist. Then allow the top of the potting soil to dry out before watering again. Once it ceases flowering, reduce watering somewhat. But never allow the roots to dry out completely. This can be very detrimental to the plant.

Like most succulents, crown of thorn will only need watering when it is actively growing. This usually occurs from late spring through the fall months.

From time to time they will need repotting. But this is usually only needed every couple years or so. Use either a cactus/succulent potting mix, or add about one third of perlite or coarse sand to the mix before using.

Crown of thorns is easy to propagate. It can be grown from tip cuttings. Normally, these would be taken in spring and early summer. When taking the cuttings, you will notice the cut will produce a flow of latex. When you see that, use a spray bottle of water to spray the old plant. Dip the cuttings in water, which should cut the flow of latex from the cut edge. You may want to wear protective gloves when you’re taking these cuttings. Otherwise, it is very easy to poke your hands against the sharp spines.

As with all succulent cuttings, I allow my crown of thorn pieces to dry out for a day or so before planting them. When potting these cuttings up, keep the potting soil slightly dry. It should only be slightly moist—never wet. In about two months, the cuttings should form good root systems.