Regal Shield Alocasias are perennial plants, which means they'll come back year after year after going into a dormant period in the winter if they're kept indoors. These Alocasias are also perennial in tropical outdoor settings, with a growing season that lasts nearly year-round. The only time Alocasia Regal Shield won't come back is if it is kept in below-freezing temperatures. Any low temperatures below 65 degrees Fahrenheit will potentially kill the plant.