If you’re looking for a plant that thrives in the conditions inside most homes, try the crown of thorns plant (Euphorbia milii). Growing the plant is easy because it adapts well to normal room temperatures and in dry indoor environments. It also forgives occasional missed waterings and feedings without complaint.
If you are lucky enough to live in one of the warmer areas of the country, you’ll enjoy growing crown of thorns outdoors as a small shrub outdoors. Plant crown of thorns in the garden in U.S. Department of Agriculture plant hardiness zone 10 and above. Sited correctly, the plant offers a mass of delicate blossoms all year round.
As with most flowering plants, the better the sun exposure, the more blooms you will get. However, crown of thorns will reliably bloom as long as it gets at least 3 – 4 hours of bright, direct sunlight per day. Outdoors, aim for a spot full sun. Indoors, place your plant in a west or south-facing winter during winter.
Apart from being an evergreen plant, Euphorbia Milli can also resist drought. It produces woody, succulent stems up to three feet high. The thorns cover the stems randomly and measure up to an inch long.
The bright green leaf bracts grow randomly and slightly sparse. They appear mostly on newer stems and fall away from the older stems. This means you can only find leaves on the youngest and newest portions of the plant.