Sempervivum (Hens & Chicks or Houseleek) is a mat-forming succulent, that produces irresistible, evergreen rosettes of thick, fleshy leaves. Cute but tough, their beauty resides largely in their infinite variations.
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Sermpervivum calcareum
Learn more at Planting Man website
https://plantingman.com/sempervivum-calcareum/