Euphorbia milii, commonly known Crown of Thorns, is an old pot and house plant.This is one of the rare succulents capable of blooming almost year-round,it has been long used as a landscape plant.Bright-green leaves grow along its thick, thorny stems. Lower leaves naturally fall off as the plant ages. Its flowers are actually bracts that last for several weeks. These flower dependably when they get enough light. They're easy to grow and drought-tolerant, preferring slightly dry, sandy soil. This succulent stores water in its thick stems just like a cactus, so it can be watered less frequently than other house plants. If its leaves turn yellow and fall off, cut back on the watering. These flowers are available in bright pink, red, white, and yellow.