| When you increase humidity, you also want to increase the air circulation. Never let orchids sit in stagnant humid air. And because you need to increase air circulation, the local humidity you want around your orchids doesn't stay around for very long. To get a consistent 10% increase in humidity, aim to increase it in the entire room your plants sit in.
If your room is small, a good sized fountain is probably enough. Room humidifiers are also great. Other than that, the only option is an orchidarium/wardian/vivarium. |