Monsoon can be tricky for houseplants, with excess humidity and slower soil drying creating the perfect conditions for root rot and fungal problems. Avoid six common mistakes: overwatering, leaving water in saucers, keeping plants in dark corners, using pots without drainage holes, overcrowding plants and ignoring damp or damaged leaves. Instead, check soil moisture, improve airflow, provide bright indirect light and regularly inspect your plants throughout the rainy season.