A Norfolk pine can be planted outside as long as seasonal outdoor temperatures do not drop below 35 degrees. It also requires high humidity and several hours of direct sunlight a day.
The hardy evergreen connotation, the Norfolk pine is actually a tropical plant. It thrives in a temperature range of 50 to 72 degrees, but can survive in as high as 90 degrees in wetter climates. The Norfolk pine does well as an indoor house plant as long as it is routinely misted with cool water or placed near a humidifier. When properly cared for indoors, it can grow up to six inches in a year.