Humidity for house plants: dry air signs and fixes

Many house plants come from humid places. Heated homes can have dry air, mostly in winter. Dry air can brown leaf tips and attract spider mites.

This is general care advice. Check the label of your plant. Keep toxic plants away from pets and children.

What you need

Look for the signs of dry air. Brown, crisp leaf tips and edges. Curling leaves. Spider mites. Buds that fall off.
Measure the air if you can. Put a hygrometer near the plants. Many plants like 40 to 60 percent humidity. Winter heating can drop it below 30 percent.
Group plants together. Leaves release water, so a group makes the air near them a little more humid.
Use a humidifier near plants that like humid air. This is the best way to raise humidity. Clean it as the maker says.
Move plants away from heaters, vents and drafts.
Put plants that like humid air in a bathroom with a window, if the light is enough.
You may use a pebble tray, but expect a small effect. Keep the pot above the water level, so the roots do not stand in water.
Do not rely on misting. Mist dries in minutes and does little for the air.

Answer the questions. The guide shows what to do.

Do the leaf tips turn brown and crisp while the soil is not too dry?

Very little. The extra moisture lasts only until the water dries, which takes minutes.

They help only a little, because the moist air spreads through the room. A humidifier works better.

Most like 40 to 60 percent. Tropical plants such as calatheas and ferns like the upper part of that range.