Water the plant with the fertilizer every two weeks in spring, summer, and fall. In winter, allow the soil to dry to a depth of 2 or 3 inches (5-7.5 cm.) before watering.įeed the plant with a liquid houseplant fertilizer. After all of the excess water has drained through, empty the saucer under the pot so that the roots aren’t left sitting in water. Water the plant by flooding the pot with water. Crown of Thorns Growing Careįrom spring through late fall, water the crown of thorns plant when the soil is dry at a depth of about an inch (2.5 cm.), which is about the length of your finger to the first knuckle. The plant can withstand temperatures as low as 50 F. Place the plant in a very sunny window where it will receive three to four hours of direct sunlight each day.Īverage room temperatures of between 65-75 F. It also forgives occasional missed waterings and feedings without complaint.Ĭrown of thorns houseplant care begins with placing the plant in the best possible location. Growing the plant is easy because it adapts well to normal room temperatures and in dry indoor environments. If you’re looking for a plant that thrives in the conditions inside most homes, try the crown of thorns plant ( Euphorbia milii). In the right setting, hybrids of Euphorbia (crown of thorns) bloom almost year round. Over the past 20 years, hybridizers have improved the plant so that it produces more and larger flowers (and if the saying is true, better luck) than ever before. In Thailand it is said that the number of flowers on a Euphorbia crown of thorns plant foretells the luck of the plant keeper.

A crown of thorns and roses