Plant Profile: Euphorbia tirucalli

Euphorbia tirucalli, commonly known as Indian Tree Spurge, is a succulent shrub or tree characterized by its thick trunk, brown main branches, and slender, green new growth. The leaves are primarily found at the tips of the branches, accompanied by inconspicuous flowers nestled within vibrant bracts. This plant thrives in tropical to semi-tropical environments and is reliably hardy in USDA Zone 11. Currently, it can also be found in the southern regions of Florida and California, which fall under Zone 10. Known for its drought resistance, when cultivated outdoors in warmer climates, it can grow up to 30 feet tall and is often utilized as a hedge or barrier. In cooler climates, it can be maintained at a smaller size and serves well as a houseplant.

For optimal outdoor growth, this plant flourishes in arid conditions with temperatures ranging from 50 degrees at night to 75 degrees during the day. It prefers well-drained soil that is nutrient-rich but not overly organic, and should only be watered when the soil is dry. In areas with hot summers, it is advisable to place the plant in a location that receives some afternoon shade. When grown indoors, a mixture of coarse loam, peat moss or leaf mold, and gritty materials like coarse sand is recommended.

It is important to wear gloves when handling this plant to prevent exposure to its toxic sap.

Regarding pests and diseases, there are no significant insect or disease issues reported, but it is wise to monitor for nematodes, spider mites, aphids, and mealybugs. Fungal and bacterial infections may also occur.