Convolvulus: Dwarf morning glory
Height 15-38cm (6-15in)
Planting distance 15-23cm (6-9in)
Flowers mid-summer to early autumn
Sunny, sheltered site
Dwarf morning glory, Convolvulus tricolor, the only annual in the genus, has all the beauty of its cousin, the white-flowered perennial bindweed (C. arvensis), without its strangling habit.
Its funnel-shaped, which are on display from mid summer until early autumn, are a magnificent deep blue with a white or yellow throat. Carried on 30-38cm (12-15in) high bushy and erect plants with oval, dark green leaves, they look most effective in formal bedding schemes or mixed borders.
The following favourite varieties have been developed from Convolvulus tricolor.
‘Blue Ensign’ has brilliant blue flowers with yellow and white centres. It is a dwarf variety, 15cm (6in) high.
‘Dwarf Rainbow Flash’ has large flowers in mixed colours: pink, carmine, rose, deep blue, pale blue, purple and lilac. It is 15cm (6in) high.
‘Royal Ensign’ has blue flowers with white and yellow centres.
Sow the seeds under glass in pots of seed compost in early spring and keep at a temperature of 15-18°C (59-64°F). When the seedlings are large enough to handle, prick out into boxes. Harden off before planting out in late spring.
Alternatively, sow in the flowering site in, and thin to 15-23cm (6-9in) apart.
The plants will grow in any well-drained soil, even poor, dry ones, in a sunny sheltered site. Dead-head regularly.
Pests and diseases