Pest identification
What's eating my grapefruit mint?
Aphids
Signs: Green or black colonies on soft shoot tips; curled leaves and sticky honeydew; ants may be farming them.
Control: Spray with a strong water jet or insecticidal soap. Remove ant barriers to expose aphids to natural predators. Pinch out infested tips.
Mint flea beetles (Longitarsus waterhousei)
Signs: Small round pits on the leaf surface; adult beetles drop or jump when leaves are touched.
Control: Use row covers early in the season. Hand-pick adults. Apply insecticidal soap spray to adults; ensure good garden hygiene to reduce overwintering populations.
Spider mites
Signs: Pale flecking across leaves; bronzed or silvery sheen in dry summers; light webbing on undersides.
Control: Water regularly to avoid drought stress. Spray thoroughly with neem oil or insecticidal soap in the evening, covering leaf undersides, every 5–7 days.
Slugs and snails
Signs: Jagged holes in young mint leaves near the soil; slime trails visible after cool, wet nights.
Control: Hand-remove at dusk, use iron phosphate-based slug pellets, or set beer traps. Avoid thick mulch immediately around stems.
Keep grapefruit mint pest-free
Healthy plants resist pests best. Get the basics right:
Grapefruit Mint pests — FAQ
What is eating my grapefruit mint?
Grapefruit Mint (Mentha x piperita f. citrata 'Grapefruit') is susceptible to aphids, spider mites, mint flea beetles, and slugs — the classic mint pest complex. Its lush, moisture-loving foliage can also develop powdery mildew in still air. Aphids are the most frequent nuisance, especially on new growth in spring.
How do I get rid of aphids on grapefruit mint?
Green or black colonies on soft shoot tips; curled leaves and sticky honeydew; ants may be farming them. Spray with a strong water jet or insecticidal soap. Remove ant barriers to expose aphids to natural predators. Pinch out infested tips.
How do I get rid of mint flea beetles (longitarsus waterhousei) on grapefruit mint?
Small round pits on the leaf surface; adult beetles drop or jump when leaves are touched. Use row covers early in the season. Hand-pick adults. Apply insecticidal soap spray to adults; ensure good garden hygiene to reduce overwintering populations.
How do I get rid of spider mites on grapefruit mint?
Pale flecking across leaves; bronzed or silvery sheen in dry summers; light webbing on undersides. Water regularly to avoid drought stress. Spray thoroughly with neem oil or insecticidal soap in the evening, covering leaf undersides, every 5–7 days.
How do I get rid of slugs and snails on grapefruit mint?
Jagged holes in young mint leaves near the soil; slime trails visible after cool, wet nights. Hand-remove at dusk, use iron phosphate-based slug pellets, or set beer traps. Avoid thick mulch immediately around stems.