Turquoise Lagoon is at the cutting edge of sweet pea breeding, resulting from crossing the traditional sweet pea, Lathyrus odoratus with another species Lathyrus belinensis. This hybrid has unusual characteristics putting it in the new category of sweet peas, known as "shifters". When the flowers first open they are a warm rosy lavender colour, but as the flowers age, either on the plant of when cut they shift to a turquoise blue. Not quite as tall as traditional sweet peas, it will grow to a height of 1.5m, produce abundant flowers and is one of the most highly scented varieties. Bred by Dr. Keith Hammett. The seeds are noticeably smaller than the normal sweet pea.