Crested Gecko Humidity Guide

Crested geckos are native to the humid rainforests of New Caledonia where humidity fluctuates throughout the day. Replicating this wet/dry cycle in captivity is critical. Mist to spike humidity, then let the enclosure breathe and dry before the next misting. This prevents stagnant, bacteria-laden air that causes respiratory infections while still providing the moisture needed for healthy shedding and hydration.

• Mist twice daily — morning and evening are the standard schedule
• Each misting should spike humidity to 80%+ across the enclosure
• Allow humidity to naturally drop to 40-50% before the next misting
• Use a fine mist spray bottle or automatic mister — avoid soaking the enclosure
• Increase misting frequency during shedding cycles when humidity support is needed

Many beginners assume crested geckos need constant tropical humidity. This is one of the most common and dangerous mistakes. Without a dry-down period, moisture accumulates in substrate, on walls, and in hides — creating a breeding ground for bacteria and fungi that leads directly to respiratory infections.

• Constant 80%+ humidity without drying promotes bacterial lung infections
• Sealed enclosures with no ventilation trap moisture and worsen the problem
• Over-misting substrate creates mold and fungus growth on decor and walls
• Respiratory infections from poor humidity management are a leading cause of crested gecko illness

Live plants naturally assist with humidity management through transpiration. Pothos, Philodendron, and Bromeliads are excellent choices for crested gecko enclosures — they tolerate the wet/dry cycle, provide climbing structure, and release moisture between mistings. Pair live plants with a bioactive or well-draining substrate to prevent root rot while maintaining the humidity cycle your gecko needs.

• Use a digital hygrometer with a probe — dial gauges are notoriously inaccurate
• Place the probe in the middle of the enclosure at gecko level, not at the top
• Monitor the dry-down period — humidity should reach 40-50% before next misting
• Check humidity at multiple times of day to confirm the full cycle is working
• Replace or recalibrate hygrometers annually — sensors drift over time