Luminosity (June) Luminosity (August) Luminosity (March) Luminosity Luminous green in late spring £3.20 Out of stock. A green variety but with a brightness in spring that catches the eye and the small brown tips of the leaves accentuate the bright green. Like all Semps, the colours change with the seasons. Well named. Sue Thomas (GB) 2003 Sent in 9cm pots as growing, established plants.