Convolvulus tricolor or Dwarf morning glory: An amazing plant for your flower beds
Convolvulus tricolor is a bushy, spreading annual or short-lived perennial with dark green, oval leaves. The funnel-shaped, royal blue flowers, up to 4cm across, are feathered white towards the base of the petals, with a yellow eye. Each only lasts a day, but they are borne in succession over a long period in summer
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.
HOW TO GROW Convolvulus tricolor
Depth: 1/8″; soak 2 hours prior to sowing
Sprout Time: 5-30 days
Starting Indoors: Start indoors in pots 6-8 weeks before planting out. Keep at 60-70°F.
Starting Outdoors: Direct sow in spring once all danger of frost has passed.
When to Set Outside: After all danger of frost has passed.
Placement & Cultivation
Cultivated since the late 17th century, dward morning glory Royal Ensign has starry rings of white and yellow etched on a deep cobalt blue trumpet-shaped flower. Great spilling over containers or allowed to weave among summer annuals where they add a pop of color. These continuously blooming flowers are effective garden edgers too. Easy to grow, they require little care, just a lean soil and sun, afternoon shade in very hot summer areas.
Final Spacing: 8-12″
Water Use: Medium Water Use
Watering Details: While somewhat drought tolerant, Convolvulus does best with about 1″ of water per week, especially during dry spells. Do not over water.
Soil pH: Slightly acidic to slightly alkaline
Fertilizer: If soil is especially poor, mix in a few inches of compost prior to planting.
Diseases & Pests: No major problems. If aphids appear, hose plants down daily until the problem is resolved. Insecticidal soap is another option, especially if spider mites are found.