Plants for impoverished dry sites are always welcome, and the dwarf morning glory, Convolvulus tricolor, is a popular and reliable choice. In frost-free gardens it's perennial and semi-evergreen, albeit short-lived.
In summer Convolvulus tricolor bears tri-coloured flowers, with yellow or gold throats surrounded by a flared white ring and then a brilliant blue red or white trumpet. Blooms last a day, but many more follow all season, attracting hordes of beneficial insects, including bees and hoverflies.
Grow Convolvulus tricolor in well-drained soil in a sheltered site in full sun.
