As long as your bathroom receives plenty of natural light, it can be an ideal environment for houseplants. Frosted glass in bathrooms can also help diffuse light, making it less harsh. Whatever size your bathroom, it’s likely to be more humid than other rooms in the home, which means a main bathroom can be a good habitat for leafy tropical plants. It’s important to remember though that humidity will vary depending on how much it’s used: guest bathrooms may be much less humid, so plant choice should be considered accordingly.
Many plants also enjoy the warmth of a bathroom. Just remember that underfloor heating, if you’re lucky enough to have it, will cause any potted plants standing on the floor to dry out more quickly, so keep a close eye on watering.
Plants need natural light to thrive, so bathrooms that have no windows aren’t suitable for growing live plants.