Photo guide to weeds

Coastal morning glory or mile-a-minute (Ipomoea cairica)

  • A closeup photograph of one flower of the coastal morning glory plant showing the distinctive funnel shape and lavender colour with deeper coloured throat
    Coastal morning glory flower
  • Photograph of coastal morning glory vine covering the ground and growing up on tree trunks
    Coastal morning glory infestation

General information

Native to tropical Africa and Asia coastal morning glory is a weed capable of very rapid growth. It is becoming common in coastal areas, particularly along river banks.

Significant infestations of Coastal morning glory may lead to a reduction in biodiversity through the destruction of native vegetation. This practice, in turn, may lead to the displacement of certain native animals due to habitat destruction.

Coastal morning glory is not a declared pest plant under Queensland legislation.


Scientific name Ipomoea cairica
  • Vine that is a vigorous grower, developing into a thick, covering mat of vegetation, sometimes climbing 4-5m into the canopy.
  • Leaves are round, 3-10cm long and wide, leaf stalk 2-6cm long, deeply divided with 5-7 lobes.
  • Flowers are funnel-shaped pink - lavender with a deeper-coloured throat, 3.5-6cmm long, 6-8cm wide.
  • Seeds are dark brown to black, 5-6mm long.
  • Common in coastal areas.
  • Common along riverbanks.
  • Most likely native to tropical areas of Africa and Asia.
Life cycle
  • Flowers throughout most of the year.
  • Spreads by seed and spreading stems.


  • Smothers native vegetation.
  • Reduces biodiversity.


  • Destroys the habitat of native animals.

The best form of weed control is prevention. Treat weed infestations when they are small - do not allow weeds to establish.
Ways to prevent weed spread


Physical control

  • Manually remove using a brush hook or similar tool.
  • Dig out and remove crown and roots to prevent regrowth.

Herbicide control

  • Herbicides effective on larger infestations

See the Coastal morning glory fact sheet (PDF, 182KB) for herbicide control and application rates.

Biological control

  • There is no biological control agent available for this plant.
Declaration details
  • not a declared species under Queensland legislation but may be declared under local government law

Last updated 07 March 2014