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Humidity Guide

What is humidity?

Humidity in the home is one of the hardest things to get right, and even if you hit the perfect level, it is very difficult to maintain constant and consistent. Fortunately in most cases Humidity for houseplants is of little importance, the section below looks at the moisture problems and the effect on indoor plants.

Fortunately in most cases humidity for houseplants it is of little importance

Moisture is extracted from all material exposed to dry air, which is why laundry dries when you put it on the line outside.

On a bright sunny slightly windy day, the laundry will dry very quickly, as the air is dry and dry the humidity is low. You will notice that if the day is particularly “humid” it takes longer for the laundry to dry and even then may not dry completely, on days like this the humidity is high.

Too much moisture can cause mold to grow on top of house plant soilConsidering houseplants and humidity. If the average indoor plant is surrounded by low humidity, water will be more easily removed from the leaves of the plant. In most cases it will result in the roots of the plants taking up more moisture to replace what has been lost, resulting in the soil drying out faster and you need to water more. If the water loss is too great for the plant to replace what is lost, you will get side effects such as crispy brown leaf edges, leaf drop and in some cases the flower buds fall off.

If the humidity is very high for a long time, you will avoid the above problems (yay!), But attract fungal disorders, white mold on the surface of houseplants, rot and some pests (boo!) That everyone enjoys in such humid conditions.

Humidity in the home

Low humidity is sometimes a problem during the winter months because the majority of houses have central heating, or fires that dry out the air considerably. The upside of this is that during the winter months, the plant does not grow as much or is instead in a rest / rest period so you do not need as much water. Therefore, dryness at roots and low humidity for short periods is not usually a major problem at this time of year.

High humidity usually only occurs in the bathroom and kitchen, as both places have running hot water from bathtubs, showers, cooking etc which creates steam and therefore moisture. Fortunately, once again, it is very rare that the bathroom or kitchen is constantly saturated with steam and therefore these places can make perfect places for plants that require high humidity.

Increasing humidity

Let’s say you have a problem with low humidity all year round, ie in an air-conditioned office or dry city apartment, and you have noticed that your indoor plants are suffering, what can you do?

Pebble trays

Place Simple stone tilewashed gravel / sand / pebbles in a large shallow water-filled tray. Then place the pot on top. This creates a small level of water under the pot that cannot be absorbed by the plant’s roots. Instead, the water gradually evaporates, increasing the moisture around the plant. Make sure not to let the pot sit in the water though as this will encourage roots to rot.


By far the simplest solution for temporary low humidity levels is missing. It’s just about buying a spray bottle and missing the plant so often. If the temperature is high, you may need to mist several times a day.

Group plants together

If you group several houseplants close together, they will create a natural increase in humidity.


If you do not have time to constantly make mistakes, wander around with stone tiles or if you cannot group a number of plants together, consider investing in a humidifier. These machines add moisture to the air. Like plants, not many people like constant dry air either and humidifiers can alleviate this problem.

Decreasing humidity

What can you do when you have noticed many problems associated with high humidity such as mold in the soil of your house plants, rot and various pests?


It is unusual for areas in the home to be very grateful and out of date if good ventilation is provided. In winter, however, this can be an issue as most ventilations come from opening a window, which you may not want to do at this time of year! If you cannot increase ventilation, try the following:

Extra care when watering

Take extra care when watering. It’s so simple. Spend a few extra minutes to make sure that you have not watered the plant and lose excess water collected in the drip tray etc.

Move the plant

Remember to move the plant to a drier place in the home. Although it is only a few months during the winter season.


If the above doesn’t help or can’t be done, you may want to consider investing in one dehumidifiers. These machines remove moisture from the air, keep your plant happy, but also remove problems from your home in connection with high humidity, such as mold and fungus that grows on your walls and ceilings.

About Elisa

I love flowers and bonsai trees

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