Morning Glory

About this weed

The Morning Glory Bush: A Beautiful But Problematic Invasive in South Africa

While the Morning Glory Bush (Ipomoea carnea), with its vibrant pink or purple flowers, might seem like a lovely addition to your garden, it’s known by other names in South Africa like Cairo Morning Glory, Five-fingered Morning Glory, Messina Creeper, or Mile-a-Minute – and unfortunately, it’s more villain than hero. This beautiful climber is classified as a dangerous invasive weed due to its aggressive growth and potential to harm local ecosystems. Let’s understand its characteristics, dangers, and how to control it:

Characteristics:

• Appearance: A climbing vine with heart-shaped, bright green leaves and showy trumpet-shaped flowers in shades of pink or purple.
• Growth: Can reach up to 3 meters tall, quickly smothering surrounding plants with its dense foliage.
• Native range: Tropical America, but widely introduced and naturalized in warmer climates like South Africa.
• Spread: Reproduces prolifically through seeds, dispersed by wind and animals.

Why it’s dangerous:

• Invasiveness: Overruns native vegetation, disrupting ecosystems and reducing biodiversity.
• Competitiveness: Depletes resources like water and sunlight, hindering native plants’ growth.
• Habitat disruption: Can alter soil composition and fire regimes, impacting native animal populations.

Natural control methods:

• Hand-pulling: Effective for young plants, ensuring complete removal of roots.
• Smothering: Cover the plant with thick mulch or black plastic to deprive it of sunlight.
• Controlled burning: In specific situations and with proper permits, fire can manage large infestations.
• Encouraging natural enemies: Attract insects like leaf beetles and lacebugs that feed on the plant.

Chemical control (last resort):

• Herbicides: Use only as a last resort and choose selective herbicides specific to Ipomoea carnea to avoid harming other plants.
• Follow label instructions carefully: Wear protective gear and apply only in calm weather to prevent drift.
• Be aware of regulations: Check local regulations regarding herbicide use in your area.