Clematis macropetala 'Blue Lagoon' gets its name from the deep blue nodding bell-shaped flowers with yellow and white centres, which are freely produced in spring.
The flowers are large, between 5cm-8cm in diameter.
A second flowering may occur in August too.
Clematis macropetala 'Blue Lagoon' was raised by George Jackman and Son, England, and released in 1958. It is sometimes known as 'Lagoon'.