How Do You Care For Euphorbia Milii?

How Do You Care For Euphorbia Milii?

Euphorbia Milii (Crown of thorns) doesn’t need much care. It is a perennial that can be grown in the garden and make an excellent specimen.

In colder climates such as zones 9, 10, and 11, crown of thorns can be grown as a houseplant for years without any problem. This is because you do not need to worry about frost damage on the leaves or stems.

However, keep in mind that if your plant does succumb to frost damage it will not recover from it. The following are factors to consider when caring for Euphorbia Milii;


This is one of the most important factors in growing Euphorbia Milii (crown of thorns). If you plant in full sunlight or direct sunlight then the plant can flourish, but if you are planting it in a shaded area or a room where there is no sunlight then it will not bloom as much.

In the winter, place crown of thorns indoors on a bright window facing south so that it can bring some spring color to your home.


Euphorbia Milii (Crown of thorns) needs a lot of water during the summer months. It can be grown as a houseplant outside in the summer if you are impatient to see results or if you want to keep your crown of thorns alive all year.

If you are growing it indoors in the winter, then make sure that it gets watered only once a week, otherwise it could get a stem rot or die.


Euphorbia Milii (Crown of thorns) can be grown in most soil types. If you have sandy soil or very well-draining soil it does better. However, it can also grow in clay-based soil because of the great drainage that crown of thorns has. It is a good idea to add compost to your crown of thorns in order to keep the pH between 6.5 and 7.


Euphorbia Milii (Crown of thorns) does not mind the temperature. It can be grown in optimal temperatures between 65 and 75 degrees Fahrenheit. However, if you don’t want your crown of thorns to completely die during the winter then make sure the temperature is between 50 and 60 degrees Fahrenheit. This can help it to survive the winter and it can grow in spring again.


Euphorbia Milii (Crown of thorns) doesn’t need much humidity. It can be grown in a room with 40-60 percent humidity. However, it needs more humidity than that if you want to grow it outdoors. It can tolerate 30-40 percent but it is a good idea to lower the humidity if you are growing it indoors in the winter so that its leaves do not burn from the moisture.


This is one of the important factors in growing crown of thorns just like other succulents. It needs a little bit of fertilizer every time you water your plant. Plants that are grown outdoors will need less fertilizer than indoor plants, but don’t forget to check the label of the fertilizer and add only half strength.


Euphorbia Milii (Crown of thorns) needs to be repotted once every two to three years in a while because their roots are so deep.

Do not repot it in the summer or spring because you do not want your plant to be subject to cold temperatures. Wait until fall or winter and repot Crown of thorns in a well-draining soil with an equal amount of fresh potting soil and compost.


Euphorbia Milii (Crown of thorns) can be propagated from cutting. The best time for cuttings is spring and summer when the plant is actively growing.

Use a clean, razor-sharp knife or blade to prevent excessive damage and disease transmission to the parent plant. Take a 3- to 4-inch-long (7.5- to 10-centimeter-long) slice across the leaf’s tip. Cut across the apex (the topmost part of the leaf) as well.

Take a slightly larger slice about an inch from the bottom of the plant and lay it down in a container filled with moist potting mix. Make sure that you don’t cover the entire leaf or stem. Keep your cuttings in a warm, sunny spot and water it well. It should root within two weeks.


It is a good idea to prune Euphorbia Milii because it helps the plant to keep a nice shape. If you notice that your plant is growing too tall then you need to trim it down. You can also cut off dead leaves and stems or those that are damaged.

Pests and Diseases

There are no pests or diseases that can harm Euphorbia Milii, but it can be susceptible to spider mites. If you notice spider mites then knock the plant down and spray with a strong solution of water and dish soap. Do this every other week for the first six weeks after you notice the problem.

Does Euphorbia Milii Need Full Sun?

The Euphorbia Milii requires ample sunshine and well-draining soil when planted outdoors. In particularly hot and dry locations, when the noon sun may scorch the leaves, plants will require shade. Crown of Thorns succulents are adaptive and flexible indoor plants. Euphorbia Milii thrives in full or partial shade, but does not require direct sunlight to flower.

In the winter months, plants are still in active growth and will benefit from a minimum of ten hours of daily light, unless you live in a northern climate with heavy snowfall. The plant can withstand temperatures as cold as -18°F (0°C) without damage.

In order to grow Euphorbia Milii outdoors, choose an area that is well-drained and in full sun. The plant will live happily in a wide range of soil types, but needs good drainage to prevent root rot.

Euphorbia Milii can grow to 3-5 feet tall and 2 feet wide, and can be trimmed at any time with very sharp shears or a clean blade. If the leaf-stem is damaged or the plant becomes dehydrated, it can be cut back to the base and new growth will develop. The smaller stems on younger plants are particularly easy to remove without harming the main plant.

Is Euphorbia Milii Indoor Or Outdoor?

Euphorbia Milii is an indoor plant that does very well indoors with no major issues. It can be kept outdoors in warm, sunny locations for some months during the winter if you want to keep it alive.

The crown of thorns does not like really warm temperatures and can die in the summer if you do not water it. You can protect your plant from being frozen by choosing a sunny location with good drainage.

Despite its somewhat unappealing name, Euphorbia Milii (crown of thorns) is a really attractive succulent plant that may bloom nearly year-round, even indoors. Euphorbia Milii (Crown of thorns) can be grown in full sun or with the addition of some light shade from the top.

The edges of this plant are particularly soft and can be trimmed very neatly. It is a good idea to use a sharp, clean blade for trimming Euphorbia Milii because it does not need to be cut too wide to prevent damage to the plant or the leaves.

How Do I Get My Euphorbia Milii To Bloom?

If you have a Crown of Thorns plant at home then you may wonder how to get it to bloom. The Euphorbia Milii is an attractive plant and will flower for many months without going into dormancy and then blooming again in spring. You can keep your plant blooming for as long as possible if you remember to prune it regularly.

Constant pruning will also prevent the growth of long stems that are unattractive, and clip off damaged leaves or those that have turned black from the crown of thorns. The optimal growing conditions for Euphorbia Milii are full sun, or six hours of sunshine every day.

According to the Wisconsin Horticulture Division of Extension, however, much nighttime light might be damaging, as these plants require darkness in the evening to induce flowering. The following are some of the ways to make Euphorbia Milii bloom;

Enough sunlight

Euphorbia Milii needs a lot of light to produce flowers. Crown of thorns plants require bright, sunny indoor locations for blooming. Be sure to give it enough sunlight every day in an area where it does not get too hot.

Euphorbia Milii likes to be in a location that has enough air circulation and could get too hot, so keep an eye out for it. If you are worried about these things, then you can always create a small greenhouse or a conservatory where you can place the plant indoors.

Proper feeding

In order to have the Euphorbia Milii bloom, you must ensure that there is adequate light and water in your plant. In addition, you need to feed the plant with a good fertilizer with a high percentage of phosphorus for the production of reproductive parts. You can feed your plant once a week with liquid fertilizer and apply it regularly so that it can bloom as much as possible.

Proper pruning

Euphorbia Milii needs proper pruning to grow and remain healthy, especially during the time when you want it to bloom. If you do not prune your plant, the growing tips will be too long and will turn brown.

The tips of your crowns can be trimmed back if they are drying out and turning brown. Also, make sure that when you cut with a sharp blade, you do not cut it too wide so that it does not hurt the plant.


Light misting your plant with water once a week will help it be happier and healthier. Not only does it make the leaves stronger, but the roots will also be happy and hydrated. This is especially important for plants that grow in particularly hot or otherwise dry areas, so that they can finish blooming and start producing fruits or seeds sooner.

Proper potting

If your plant begins to decline, then you should repot your crown of thorns succulent in order for it to bloom or remain happy. Keep in mind that repotting is the best time to trim the plant’s overall size, making sure not to cut the plant too wide. If you do not repot your plant, then it might get root rot.

The Euphorbia Milii will continue to bloom as long as it is receiving adequate water and light. Do not forget to prune damaged parts of moving stems and prune older stems that have become too long.

Is Euphorbia Milii A Succulent?

Euphorbia Milii is considered a succulent. Succulents are plants that have adapted to survive long periods of drought or other harsh growing conditions by storing water in their fleshy leaves, stems or roots. The water storage organ in Euphorbia Milii is its thick, fleshy trunk.

This plant only needs to be watered once a month because of its ability to store water in its trunk and leaves, however it prefers that soil be kept slightly dry. It also requires very little fertilizer, if any at all.

Euphorbia Milii requires a location with no direct sunlight and has a high tolerance for low humidity. It can be placed under or near lights to promote flowering.

If you have a Crown of Thorns plant at home then you may wonder how to get it to bloom. The Euphorbia Milii is an attractive plant and will flower for many months without going into dormancy and then blooming again in spring.

Crown of Thorns, or Euphorbia Milii, is a spreading evergreen shrub with succulent branches laced with long, sharp, black thorns and sparsely leafed. It is known for its very spectacular bracts.

These bracts consist of a pair of reddish, cup-shaped structures that are really petal-like. The male and female flowers are found on separate plants; the female flower is the larger and more conspicuous of the two.

In ancient times, Euphorbia Milii was used to make crowns for people who won various competitions. It is also called the Christ thorn because its bracts resemble thorns that Jesus was crowned with during his crucifixion.

When Should I Repot Euphorbia Milii?

Repotting your crown of thorns succulent will be necessary if it is growing too large. This plant needs to be re-potted when the root ball begins to get tight. However, it is important to note that this plant does not do well when it is repotted during winter months.

The reason for this is because you want your Euphorbia Milii to bloom for as long as possible, and repotting the plant will cause its growth cycle to stop for a month or so.

It is recommended that you repot your Euphorbia Milii every two to three years, and every time you repot it, remove the soil until it is as flat as it was when you got the plant. The reason for this is to prevent fungal growth.

You should also inspect your plant immediately after repotting to make sure there are no unwanted pests or mildew on your plants leaves and stems. If this is the case, then you should remove the problem immediately.

Remember that when you repot your plant, you should check its water levels and make sure it is receiving adequate oxygen. The roots of your Euphorbia Milii need to be laid down in the pot so that its crown can grow upward and begin to bloom.

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