Multiple Houseplant Issues: Overwatering Root Cause

Anita Dracaena had soil worms (eliminated by repotting) but now brown center leaves, fungus gnats, orange centipedes. Dieffenbachia had brown leaf circles. Peperomia had crumpled new growth after summer stem rot. Mold on soil in spring/fall. Owner asked about watering, distilled water, and seed propagation.

Unified Diagnosis: Overwatering

All symptoms—root rot, fungus gnats, centipedes, fungal spots, peperomia rot, soil mold—stem from excess moisture.

Comprehensive Fixes

• Dracaena: Water only when pot feels light. Kill soil bugs with rubbing alcohol drench next watering.
• Dieffenbachia: Try planting seed pods (may not germinate). Spray Lysol on leaves for fungal spots. Reduce water.
• Peperomia: Spray alcohol daily for a week (scale/aphids likely), then biweekly for a month. Water every 2 weeks, less volume. Needs high sun.
• All plants: Cut watering in fall/winter as growth slows.
• Soil upgrade: Mix 2 parts potting soil + 1 part perlite for drainage.
• Water quality: If tap has chlorine/fluoride, use distilled or let sit 48 hours open.
• Repotting: Only every 3–5 years, +2 inches diameter max. Most prefer slight root-binding.

Dryness, drainage, and light solve 90% of houseplant problems.