Aloe Vera

Season note

Water every 2–3 weeks in summer, every 4–6 weeks in winter — always let soil dry out completely first.

Overwatering signs

Soft, mushy, or translucent leaves; black spots; root rot

Underwatering signs

Wrinkled, thin, curling leaves

Light level

bright direct to indirect

Best rooms

Soil

Fast-draining cactus/succulent mix

Humidity

Low; does not need extra humidity

Fertilizer

Half-strength liquid fertilizer monthly, spring–summer only

Temperature range

13°C – 27°C

Aloe vera has one of the more genuinely uncertain origin stories among common houseplants, and that uncertainty is itself worth understanding rather than glossing over. For a long time it was widely assumed to be native to southern or eastern Africa, since the broader genus Aloe — which includes over 500 species — originated there roughly 16 million years ago and remains overwhelmingly concentrated across sub-Saharan Africa and Madagascar today. But a comprehensive 2015 phylogenetic study, led by researchers at London's Kew Gardens and the University of Copenhagen using both plastid and nuclear DNA sequencing, concluded that Aloe vera's specific ancestral origin actually traces to the Arabian Peninsula, at the northernmost edge of the aloe genus's overall range — an area of extremely hot, dry conditions in what is now Yemen and Oman. Complicating the picture further, the plant has been cultivated and transplanted by humans for so many centuries, along ancient trade routes connecting the Red Sea, the Mediterranean, and beyond, that pinpointing its true wild, un-cultivated origin has proven genuinely difficult for botanists, and some researchers have gone so far as to question whether the species survives anywhere today outside of cultivation or naturalized populations descended from cultivation.

What is well documented is Aloe vera's extraordinarily long history of human use. It appears in historical and religious texts stretching back over two thousand years, frequently mentioned alongside other valuable aromatic and medicinal substances of the ancient world like myrrh and frankincense, and historical trade records place established Aloe vera commerce along Red Sea and Mediterranean routes as far back as the 4th century BCE. Spanish and Portuguese explorers carried the plant to the Americas during the 15th and 16th centuries, and it was introduced to China, India, and parts of southern Europe by the 17th century, cementing its status as one of the most globally distributed succulents long before the modern houseplant trade existed. Today it's naturalized across huge stretches of the Mediterranean basin, North Africa, and the Canary, Cape Verde, and Madeira Islands, though most of these naturalized populations are believed to descend from long-ago human cultivation rather than truly wild, ancestral stands.