A. harlanii is a handsome variety that is suitable for growing as a houseplant. Pale green leaves, banded with dark green, grow in rosettes 7 inches in diameter. In the spring, spikes of pale pink flowers are produced. The dried juice of the leaves of several Aloes, but mainly A. vera, is commonly used to relieve some skin irritations. The leaves are broken and the oozing juice is collected in containers.
Artificial heat is used to evaporate the required amount of moisture off.
The residue from the leaves of A. vera is known as Barbados Aloes and Curacao Aloes. A. spicata, A. ferox and A. africana yield Cape or South African Aloes. These plants need a temperature of about 45 F. Large plants will tolerate bright light about half of a day, while smaller ones should be provided with shade. These succulents can survive in poor soil conditions. They will thrive in dry air and soil with good drainage.