Many tropical houseplants tolerate ordinary homes better than their rainforest origins suggest. Problems blamed on “low humidity” are often a combination of dry air, hot vents, inconsistent watering, damaged roots, or pests.
Misting is brief
A fine mist changes humidity at the leaf surface for a short time. It does not replace a stable room environment and can leave foliage wet if repeated heavily. Wet leaves plus poor airflow may encourage spotting on susceptible plants.
Grouping has limits
Plants release water, so a group can create a small local effect, but crowding also reduces airflow and makes pest inspection harder. Leave enough space to see leaves and stems clearly.
Measure before buying equipment
An inexpensive hygrometer can reveal whether the room is genuinely dry. If a humidifier is needed, clean it regularly, keep electrical safety in mind, and avoid directing cool mist continuously onto leaves or walls.