Euphorbia Leuconeura: HousePlant with Square Stem

I was given a houseplant with a unique, square stem. New leaves come from the top of the plant, and it has small white flowers that appear at the base of each leaf where the leaf joins the stem. Any idea what this is called, and how I should look after it? Thanks!

Hi Olga,


Your looks like a Madagascar Jewel Plant (Euphorbia leuconeura). Here are some care instructions on how to grow a Euphorbea leuconeura (Madagascar Jewel Plant) as an indoor houseplant.

Light: bright indirect lightVery few houseplants should be placed in direct sun. High light refers only to bright indirect light since direct sun often burns the leaves of indoor houseplants. An area that is too hot and dry encourages Spider Mites and causes blooms to quickly fade. A northern exposure really doesn't provide enough light for high light plants. These plants need to be placed directly in front of an east-facing window, within 1-3 feet of a west-facing window, and within 5 ft. of a south facing window. A high light area has over 300 ft. candles of light., no direct sun.

Water: Water once a week, or when the top 50% of the soil has dried out, when a Euphorbia Leuconeura is actively growing in the Spring and Summer. Water every other week in the Fall and winter or less if the soil has not dried out.

fertilizerPlants need fertilizer only when they are actively growing. Slow growing plants in low light require very little plant food. Too much fertilizer is worse than not enough. Most plants prefer a water soluble plant food at 1/2 the recommended strength. Plants that are in bloom or dormant should not be fertilized. Houseplant food contains nitrogen (N), phosphorus (P), and potassium (K). A fertilizer containing these elements in equal proportion is considered a balanced plant food. Nitrogen helps in photosynthesis and encourages the growth of leaves and stems. Potassium and phosphorus also help in photosynthesis and aid in root and flower development. Most fertilizers have trace elements of other minerals that are lacking in the soil but are necessary for good plant growth. Fertilizers have a high salt content. If a plant is not producing new leaves and doesn’t absorb the fertilizer, salts build up in the soil. These salts can burn the roots, discolor the leaves, and cause new growth to be small.: Feed monthly with a plant food for Succulent PlantsLearn how to grow and care for succulent plants at when your Madagascar Jewel Plant is actively growing.
All parts of a Euphorbia Leconeura are poisonousPlants are a great addition to homes and offices, but it’s important to know whether your plants are dangerous to children, pets, or even adults. Some plants contain chemicals such as oxalates, solanine, glycosides, or alkaloid lycorine that may cause vomiting, nausea, diarrhea, swelling and redness of the mouth, throat, and lips, and trouble breathing. Touching parts of certain plants, especially the sap, may cause various skin irritations. The weight and age of the human or pet involved, and the part and amount of plant eaten determine how severe the reaction to the toxins will be. Although plants may be listed as non-toxic, they can still cause individual allergic reactions. If there is any question after a houseplant has been ingested or touched immediately call the Poison Control Center 1-800-222-1222 The Handbook of Poisonous and Injurious Plants [Paperback]is an excellent reference to keep around if you have young children and pets. if ingested.
Handling the plant, especially the sap, can cause skin irritation or allergic reaction.
Here is another picture of Euphorbia Leuconeura in bloom.

Square-stemmed, pink Euphorbia leuconeura

Euphorbia leuconeura