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Houseleek
Sempervivum tectorum
Also known as Hens and Chicks, Common Houseleek, Jupiter's Beard, Roof Houseleek
Key benefits
✦Traditional uses
✦Long before it had a Latin name, houseleek was a fixture of the European cottage garden, prized less for eating than for having on hand. Its cool, mucilaginous leaf juice made it a household standby for soothing minor burns, scalds, and stings, the kind of everyday remedy a grandmother kept growing by the back step rather than in an apothecary jar. Medieval and folk tradition also planted it thickly on roofs, both for its odd hardiness in thin, dry soil and for the old belief that a living roof of houseleek warded off lightning strikes. That dual role, half practical remedy and half protective charm, made it one of the most widely cultivated plants of the pre-modern European home.
How to grow & use it
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“When a small burn, a bee sting, or a sunburned patch of skin needs a cool, green answer growing right on the garden wall.”
Around the year 800, Charlemagne's Capitulare de Villis, a decree listing plants every imperial estate had to grow, specifically ordered houseleek onto the roofs of farm buildings, since it was believed to guard against lightning and fire. That rooftop habit is fossilized in its Latin name, tectorum, meaning of the roofs.
Houseleek is used topically, not taken internally. Patch test first since some people are sensitive to the sap, and keep it away from the eyes and deep or severe burns.