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How to care for a euphorbia ingens plant

Updated February 21, 2017

The Euphorbia ingens, also called the candelabra tree, the cowboy cactus and the good luck cactus, is a spiny, succulent plant that features cactus-like, segmented arms growing from a single trunk, with bright yellow blossoms on the tips of its branches in late spring. A native of the East Indies and Africa, euphorbia adapts well to life as a houseplant, and may be set out in summer and brought inside before the first hint of frost. However, this is an extremely poisonous plant, and the milky latex can cause blisters on skin and even blindness if it touches the eyes. It should only be grown where it is out of reach to both children and pets.

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  1. Select the proper container for your euphorbia. It can be plastic, fibreglass or terra cotta, but if you plan to move your euphorbia outside in the summer, you should choose a container that will not be too heavy. Make sure the container has ample holes at the bottom for drainage, as well as a saucer.

  2. Provide your euphorbia with the proper growing medium. According to Cal's Plant of the Week, a soil mix consisting of one part peat moss, one part loam and two parts coarse sand is optimal. You can add some bits of small gravel to help with drainage; as a native of an arid environment, the euphorbia can't tolerate wet roots or soggy soil.

  3. Place the euphorbia plant in a location that receives bright, direct sunlight and stays consistently warm, between 23.3 to 27.8 degrees Celsius. A south-facing window, with the euphorbia located no more than 2 feet from the glass, is ideal. If possible, the room the euphorbia is in should have light-coloured walls to more efficiently reflect light. Make sure the euphorbia is not placed near an air conditioning vent.

  4. Water your euphorbia every two weeks, letting the soil dry out completely between each watering. Water the plant thoroughly, so that water runs out the drainage holes. Empty the saucer afterwards to ensure that the euphorbia is not sitting in water. In winter, when the plant is dormant, reduce watering to once a month.

  5. Feed your euphorbia in the spring when new growth begins. Use a water-soluble fertiliser in a 10-10-10 NPK formulation, diluted to half the recommended strength.

  6. Don protective gloves and use a clean, sharp knife to take a cutting from your euphorbia to propagate it. Do this in the spring, Take the cutting from a branching point and hold the cut section under cold water to stem the flow of milky latex. Before planting, allow the cutting to dry out for two weeks to form a callus over the cut end.

  7. Warning

    All parts of the euphorbia are poisonous if ingested.

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Things You'll Need

  • Plastic, fibreglass or terra-cotta container
  • Peat moss
  • Loam
  • Coarse sand
  • Gravel
  • Commercial water-soluble fertiliser in a 10-10-10 NPK formulation
  • Protective gloves
  • Clean, sharp knife

About the Author

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