Creeping Charlie with Rust? Rare but Treatable

Glechoma hederacea

Susceptibility: Low Severity: Medium Difficulty: Easy

Rust is a common fungal disease caused by fungi in the order Pucciniales that affects a wide variety of plants. The disease gets its name from the characteristic orange, yellow, or reddish-brown pustules that appear on leaves, resembling metal rust. This obligate fungal parasite requires living plants to survive and can cause significant economic losses in agricultural crops.

🔍 Symptoms

• Raised orange, yellow, brown, or red pustules on leaf surfaces
• Ring-shaped or oval spore masses, typically on leaf undersides
• Premature yellowing and leaf drop
• Stunted plant growth
• Orange dust transferring to hands or clothing when touched
• In severe cases, death of entire leaves

❓ Possible Causes

→ Infection by lightweight fungal spores carried by wind or water
→ Wet foliage for 6-10 hours at temperatures of 15-25°C (59-77°F)
→ High humidity and poor air circulation
→ Late-day overhead watering leaving leaves wet overnight
→ Nearby alternate host plants (many rust fungi require two hosts)
→ Soft, susceptible growth due to excess nitrogen

💊 Treatment

⚡

Quick Fixes

Immediate Pruning

Cut all visibly infected leaves and dispose. Clean tools.

Systemic Application

Apply systemic fungicide (azoxystrobin or similar) according to package instructions. Product will be absorbed and circulate through the plant.

Reapplication

Reapply after 7-14 days as per product label.

Environmental Adjustment

Switch watering to early morning and improve ventilation.

🌿

Organic Treatment

Mechanical Removal

Remove all infected leaves and parts with clean shears. Dispose in trash (not compost). Clean tools with 70% alcohol between cuts.

Sulfur Application

Apply sulfur fungicide to all leaf surfaces, especially undersides. Do this in the morning for quick drying. Do not apply above 30°C (86°F).

Watering Adjustment

Switch to drip irrigation or water directly at soil level. If using overhead watering, do so between 5-10 AM.

Improve Circulation

Prune dense branches to increase airflow. Maintain proper spacing between plants.

Monitoring

Inspect weekly. Reapply sulfur every 7-10 days for 3 weeks. Continue for 2 weeks after last symptom.

🛡️ Prevention

✓ Water early morning (5-10 AM) to allow leaves to dry
✓ Use drip irrigation instead of overhead sprinklers
✓ Improve air circulation through proper pruning
✓ Remove fallen leaf debris where spores can overwinter
✓ Plant resistant cultivars when available
✓ Avoid excessive nitrogen fertilization
✓ Quarantine new plants for two weeks
✓ Remove and destroy infected parts when infestation is minimal
✓ Wash tools between plants to prevent spread

🌱 Care Guide: Creeping Charlie

💧 How to Water

Water when the top inch of soil feels dry, approximately every 7 days. Avoid overwatering as this plant is susceptible to root rot. Reduce watering in winter when growth slows. Ensure the pot has drainage holes to prevent waterlogging.

☀️ Lighting

Prefers partial shade to medium indirect light. Avoid prolonged direct afternoon sun, which can scorch the delicate leaves. Indoors, place near a north or east-facing window. Outdoors, it thrives beautifully under tree canopies or in shaded garden beds.

🪴 Ideal Soil

Use a well-draining, loamy potting mix rich in organic matter. A blend of 2 parts potting soil, 1 part perlite, and 1 part compost works well. Slightly acidic to neutral pH (6.0–7.0) is ideal. Avoid heavy clay soils that retain too much moisture.

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