The Coral cactus (Euphorbia lactea cristata) is a mesmerizing plant. It is a hybrid of two distinct succulent species, resulting in its unique coral-like appearance.
To grow a healthy Coral cactus indoors, plant it in well-draining soil, water moderately, and provide it with plenty of bright, indirect light.
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Scientific Name: Euphorbia lactea cristata. Common name: Coral cactus, Crested Euphorbia.
Coral Cactus
The Coral cactus plant does not occur naturally in the wild. It is a man-made hybrid created through grafting a cutting of a Euphorbia lactea onto the stem of a Euphorbia neriifolia. This results in the unique appearance characteristic of the coral cactus.
The Coral cactus is often referred to as a “cactus” due to its cactus-like appearance and the common use of the term “cactus” in its name. However, strictly speaking, it is not a true cactus. Instead, it is a succulent plant.
With a relatively slow growth rate, coral cacti grown indoors can reach heights of anywhere from 12 inches to 24 inches, although some may grow taller under optimal conditions.
Related reading: Beginners Guide to Succulent Care – Difference Cactus vs Succulents.
Light Requirements
Indoors, the Coral cactus thrives in bright, indirect light, making it ideal for placement near a sunny window. But watch out for too much direct sunlight. This can cause dry burn marks, while too little light can lead to slower growth. Use a grow light if your home doesn’t receive enough natural light.
Related reading: Do succulents need sun?
Watering
When it comes to watering your Coral cactus indoors, moderation is key. Allow the soil to dry out completely between waterings to prevent root rot.
In winter, reduce watering to once a month or even less, as the plant’s water requirements decrease during dormancy. If you are uncertain when to water, you can use a moisture meter to help out.
Related reading: When to water indoor succulents – Tips to use a moisture meter.
Fertilizing
During the growing season in spring and summer, fertilize the Coral cactus with a diluted liquid succulent fertilizer. Apply every 4 to 6 weeks to provide essential nutrients for healthy growth and vibrant colors. Don’t fertilize in winter when the plant is dormant.
Humidity
The Coral cactus is not very needy when it comes to humidity. It can grow well in normal household humidity levels. No need for misting or using a humidifier to raise the humidity.
Soil and Repotting
Repotting is necessary when the Coral cactus outgrows its container or when the soil becomes depleted of nutrients. Use a well-draining cactus or succulent mix to ensure proper aeration and moisture control.
Repot during the spring or early summer months, when the plant is actively growing, to minimize stress. Make sure the new pot has drainage holes on the bottom so excess water can get out and not drown the roots.
Related reading: How to repot indoor plants.
Flowering
While mature Coral cactus plants can produce small greenish-yellow flowers in their natural habitat, blooming indoors is rare. However, the plant’s unique shape makes it a stunning addition to any indoor garden, even without flowers.
Is the Coral Cactus Toxic to Cats?
The Coral cactus, like many Euphorbia species, contains a milky sap that can be toxic if ingested by cats. Although it is rare for pets to get seriously hurt from eating plants, keep this succulent out of reach to prevent potential harm.
Related reading: Non-toxic house plants.