Sempervivum Dallas Pale green with pink overtones. £2.60 Out of stock. Medium-sized rosettes, pale green with pink overtones make Dallas stand out in a group. We think it looks best in summer, as pictured here - the summer sun develops the colours to good effect. There are lots of red Sempervivums and green ones too, but not so many with this pink colouring. Raised in the U.K by David T. Ford in the early 1980s - when J.R. Ewing was up to his tricks on the popular TV show, Dallas.