Clusters of sunny yellow flowers have orange and red highlights in the petals and bright orange hearts. Each flower cluster can reach 4-6 across creating a stunning floral show when in full bloom during the spring and summer months. Euphorbias are indestructible houseplants that thrive on neglect. Be sure to let the soil dry out between waterings. This easy-care houseplant will thrive on a sunny windowsill, or outside during the sunny summer months. It will often bloom during fall and winter if the light levels are high.