Pest identification
What's eating my yellow monkeyflower?
Slugs and snails
Signs: Ragged holes in leaves and stems; seedlings and young plants can be completely destroyed overnight.
Control: Use wildlife-safe slug pellets (ferric phosphate), copper tape around pots, or set beer traps. Hand-pick at night. Apply grit or sharp sand around plants.
Aphids
Signs: Clusters on soft shoot tips cause distorted growth, sticky honeydew, and sooty mould.
Control: Blast off with a strong water jet; encourage ladybirds and hoverflies. Use insecticidal soap spray on heavy infestations.
Powdery mildew (disease, not a pest, but commonly co-occurs)
Signs: White powdery coating on leaves in warm, dry spells weakens plants and reduces vigour.
Control: Improve air circulation; water at the base; remove affected leaves. Spray with a dilute bicarbonate of soda solution if severe.
Keep yellow monkeyflower pest-free
Healthy plants resist pests best. Get the basics right:
Yellow Monkeyflower pests — FAQ
What is eating my yellow monkeyflower?
Yellow Monkeyflower's main pest threat is slugs and snails, which shred soft, moisture-loving leaves — especially on young plants in spring. Aphids may colonise stem tips in warm spells. The plant is otherwise fairly tough and supports pollinators well when pest pressure is kept low.
How do I get rid of slugs and snails on yellow monkeyflower?
Ragged holes in leaves and stems; seedlings and young plants can be completely destroyed overnight. Use wildlife-safe slug pellets (ferric phosphate), copper tape around pots, or set beer traps. Hand-pick at night. Apply grit or sharp sand around plants.
How do I get rid of aphids on yellow monkeyflower?
Clusters on soft shoot tips cause distorted growth, sticky honeydew, and sooty mould. Blast off with a strong water jet; encourage ladybirds and hoverflies. Use insecticidal soap spray on heavy infestations.
How do I get rid of powdery mildew (disease, not a pest, but commonly co-occurs) on yellow monkeyflower?
White powdery coating on leaves in warm, dry spells weakens plants and reduces vigour. Improve air circulation; water at the base; remove affected leaves. Spray with a dilute bicarbonate of soda solution if severe.