Aloe 'Christmas Carol' is a small, slow-growing succulent that forms rosettes of dark green leaves with bright red trim and yellow to deep crimson bumps across the surfaces. It turns redder when grown in full sun. The rosettes grow up to 1 foot (30 cm) tall and are nearly equal in diameter. Leaves are thick, fleshy, lance-shaped, and up to 6 inches (15 cm) long. Flowers are reddish-pink to orange and appear atop a long spike from fall to winter.