How to Grow Convolvulus Plants in your Garden

Gardener's HQ Guide to Growing Bindweed, Morning Glory, and Silverbush

Plants from the Convolvulus genus are hardy annual or hardy perennial vines.

They have heart shaped leaves, some varieties flower but for one day, with trumpet flowers (can be blue, white, pink or purple).

Convolvulus arvensis
Convolvulus arvensis - Field Bindweed by Phil Sellen.

Many gardeners consider most Convolvulus plants to be weeds. Though many species, such as Silverbush and Dwarf Morning Glory are grown as garden plants.

The aforementioned plants are short-lived perennial evergreens they are not very hardy, so are often grown as annuals.

They make great container plants and indoor plants, and also perform well in rock gardens, sunny beds and borders, or Gravel Patios.

The annual varieties of Convolvulus bloom from mid spring, or summer to autumn, whereas perennials flower in the summer.

If you have a problem with spreading and need to remove Bindweed from the garden, then simply cut them down to the base. Keep doing this until new growth no longer occurs (because the plant is starved of energy).

Common Convolvulus Species and Cultivars

Convolvulus minor / Convolvulus tricolor - Dwarf Morning Glory

Convolvulus tricolor

Convolvulus tricolor photograph by 阿橋 HQ, Creative Commons.

Convolvulus cneorum - Silverbush, Bush morning Glory

Convolvulus cneorum

photograph by Leonora (Ellie) Enking.

Convolvulus sepium - Now classified as Calystegia sepium - Hedge Bindweed

Convolvulus sepium
Convolvulus sepium - Hedge Bindweed by Gmayfield10; Creative commons.

How to Grow Convolvulus

If planning to grow Convolvulus plants outside from seed then they should be planted at a depth of 3 mm (1/8th inch).

Sow into a sunny part of the garden in the middle of spring.

If growing Silverbush or other Convolvulus plants indoors, then start about two months before putting out.

Next, the seed should first be chipped with a knife and soaked in warm water for a full day beforehand.

They should be sown into peat pots in an area with a temperature of 22 to 28 degrees centigrade (71°F to 82°F).

Germination takes about one to two weeks.

Convolvulus Care: The seedlings of small Convolvulus species should be transplanted outdoors after the last frost of spring.

If you require more plants then cuttings of Convolvulus these can be took in the summer.

Caring for Convolvulus

Convolvulus Care: As an evergreen shrub it is best to prune in middle to late spring or once flowering has completed (depending on the time the specific species bloom. Simply remove any dead or diseased tissue.

Pruning heavily can also help to rejuvenate neglected plants.

Convolvulus Growing and Care Guide

Common Names: Bindweed, Morning Glory, Aguinaldo Blanco, Scammony, Convolvulus. Bindweed: Soft; Texas; Pygmy; Shrubby; Grey; Field; Mallow. Morning Glory: Dwarf; Ground; Japanese.
Life Cycle
: Hardy annual. Hardy perennial. Evergreen
Height: 12 to 144 inches (30 to 360 cm).
Native: Temperate regions.

Growing Region: Zones 3 to 9: Perennials 7 to 10. UK Hardiness H4 (to —10°C / 14°F)
Flowers: Late spring to early winter.
Flower Details: White, pink, yellow, blue violet, purple. Trumpet-shaped.
Foliage: Heart shaped leaves (Cordate). Spirally arranged. Sometimes variegated. Sometimes evergreen.

Sow Outside: 1/8 inch (3mm). Mid-spring; temperature should not drop below 50°F (10°C). Spacing: small 6 inches to 12 inches (15 to 30 cm); large 18 to 24 inches (45 to 60 cm).
Sow Inside: Chip seeds. Soak overnight. Use Peat pots. Germination time: four days to two weeks. Temperature 75°F (24°C). Six weeks before expected last frost. Transplant outdoors in mid spring; temperature should not drop below 50°F (10°C).

Requirements: Full sunlight. Good drainage. Soil pH 6 to 8. Regular watering. It may be necessary to trim leaves to display flowers. Propagate: cutting in summer.

Family: Convolvulaceae.
Closely Related Species: Morning Glory; Star Ipomoea; and Moonflower Plants
Miscellaneous: Large genus of shrubs, bines and vines. This means that some are treasured, some are weeds, and others still are threatened.

I hope that you enjoyed this guide on how to grow Convolvulus plants. You may also enjoy the following Gardener's HQ growing guide: How to grow Morning glory.