Why do some plants produce oxygen at night?
Plants are essential for life on Earth because they absorb carbon dioxide and release oxygen through photosynthesis. Many people think that all plants only release oxygen during the day, but this isn't always true. Some species have the ability to produce oxygen at night as well, which is especially beneficial for indoor spaces and bedrooms.
Most plants perform the C3 or C4 photosynthesis, where they absorb carbon dioxide (CO2) during the day to release oxygen (O2) thanks to sunlight. However, at night, this process stops, and most plants respire like humans: they take in oxygen and release carbon dioxide. But there is a group of plants with a special mechanism called CAM photosynthesis (Crassulaceae Acid Metabolism), which allows them to carry out gas exchange at night, absorbing CO2 and releasing oxygen even without sunlight.
Benefits of having plants that produce oxygen at night
Incorporating plants of this type into your home can bring multiple advantages:
- Improve air quality by eliminating toxins, dust and harmful compounds.
- They regulate humidity, helping to maintain a comfortable environment.
- They promote rest and relaxation thanks to its purifying action and, in some cases, its calming aromas.
- They contribute to the natural decoration and provide mental well-being thanks to contact with nature (biophilia).
Some research has shown that the presence of plants in the bedroom can reduce heart rate, reduce stress, activate the parasympathetic system and help you sleep better. In addition, they help regulate ambient carbon dioxide, which translates into deeper, more restful sleep.
Is it good to sleep with plants? Debunking myths
For a long time it was thought that it was not good to have plants in the bedroom, since they could "steal oxygen" at night. However, this myth has been debunked by science. The amount of oxygen a plant can consume in the dark is negligible compared to what it produces during the day, and, above all, some species with CAM metabolism are able to continue releasing oxygen at night. Their environmental and air quality benefits far outweigh any possible negative effects.
For this reason, some of the best plants for bedrooms and rest areas are those that produce oxygen also at night and, in addition, they provide relaxing and purifying properties.
More than 15 plants that produce oxygen at night
Below, we present a selection of the most recommended plants to have in your home for their ability to release oxygen in the dark, purify the air and, in many cases, are hardy and easy-care species.
- Sansevieria (Sansevieria trifasciata / Mother-in-law's tongue / Snake plant)
One of the easiest indoor plants to care for and most efficient at purifying the air and releasing oxygen at night. It also eliminates toxins such as benzene, xylene, and formaldehyde. It tolerates low light and sparse watering and is resistant to pests and diseases, making it ideal for bedrooms.
Its ability to absorb carbon dioxide and release oxygen at night has been confirmed by NASA experiments and is perfect for people who are new to plants.
- Aloe vera (Aloe barbadensis miller)
Famous for its medicinal properties for the skin, aloe vera This is another CAM plant that releases abundant oxygen in the dark. It's very easy to maintain, requires little watering, and adapts well to a lack of direct light. It also helps cleanse the environment of toxic substances and provides a natural and fresh decorative touch.
- Gerberas (Gerbera jamesonii)
La gerbera It's an ornamental plant highly prized for its colorful flowers, but it's also notable for its ability to release oxygen at night. It's often recommended for bedrooms of people with respiratory problems such as sleep apnea or allergies, as it helps improve air quality.
- Orchid (Phalaenopsis and other varieties)
Orchids, besides being elegant and exotic, perform CAM photosynthesis and purify the environment of pollutants like xylene. Many orchids give off a soft aroma that provides a sense of tranquility. They are ideal for decorating nightstands or shelves in well-lit environments.
- Pothos (Epipremnum aureum)
Also known as the "love plant," the pothos is capable of eliminating formaldehyde and toxins and releasing oxygen while decorating with its drooping foliage. It adapts well to both indirect light and partially shaded spaces. It is a hardy plant and very easy to propagate through cuttings, ideal for those seeking a healthier, greener environment at home.
- Spathiphyllum or peace lily (Spathiphyllum wallisii)
The peace lily is one of NASA's most recommended plants for air purification. In addition to releasing oxygen at night, it helps regulate ambient humidity and eliminate mold spores and other pollutants. Its white flowers are very decorative.
Caution: Not suitable for homes with pets, as it can be toxic if ingested.
- Areca palm or bamboo (Dypsis lutescens)
The areca palm is one of the best plants for purifying indoor air. It absorbs toxins, regulates humidity, and constantly produces oxygen. It prefers bright environments without direct sunlight and requires moderate watering.
- Purple basil (Ocimum tenuiflorum)
In addition to its use in cooking, purple basil It's another CAM plant that releases oxygen at night. Its soft aroma helps relax the environment, and it's easy to grow in a pot.
- Adam's Rib (Monstera deliciosa)
This tropical plant, very popular in decoration, helps oxygenate the air while absorbing pollutants. Its large leaves bring freshness and style to any space, and despite its exotic appearance, it is quite hardy.
- Neem (Azadirachta indica / Neem / Indian lilac)
Neem is well known for its medicinal properties and its ability to cleanse indoor air of toxins. It's easy to maintain and produces oxygen overnight, making it an attractive and healthy choice for the home.
- ferns
There are many species of ferns that help eliminate pollutants and release oxygen, improving the overall environment. They are ideal for bathrooms and kitchens, as they like humidity and indirect light.
- Lavender (Lavandula spp.)
In addition to its relaxing aroma, which reduces stress and improves sleep, lavender helps purify the air and can release oxygen during the night. Placing a lavender plant in your bedroom is an excellent natural way to help you get some rest.
- Chlorophytum or spider plant (Chlorophytum comosum)
One of the most recommended and resilient plants for air purification. It absorbs formaldehyde, xylene, and other toxic compounds and constantly releases oxygen. It's suitable for beginners and grows well in hanging baskets or as a tabletop plant.
- Ribbon plant (Chlorophytum comosum)
Similar to chlorophytum, the ribbon plant absorbs toxins like xylene and toluene and is very easy to care for. It's perfect for those looking for a hassle-free and effective plant to improve the environment.
- Kentia palm (Howea forsteriana)
Ideal for offices and bedrooms, the Kentia palm It is capable of absorbing large amounts of carbon dioxide and releasing oxygen, in addition to eliminating environmental toxins. It adapts well to low-light conditions and is decorative due to its elegant appearance.
- Crassulas (Family Crassulaceae)
Many succulents such as crassula They also employ CAM photosynthesis, releasing oxygen when the environment is dark. They are very easy to care for and perfect for those looking for low-maintenance options.
- English ivy (Hedera helix)
Ivy is an indoor or outdoor climbing plant that helps reduce mold and particulate matter, improves air quality, and releases oxygen indoors.
- Geranium (Pelargonium x hortorum)
In addition to its showy flowers, geranium helps purify the air and releases oxygen at night, especially useful in bedrooms and closed rooms.
Basic care for indoor plants that produce oxygen at night
For these plants to provide all their benefits, it is important to provide them with appropriate lighting, watering and location conditionsHere are some key tips:
- LuzPlace them in indirect light, avoiding direct sunlight, which can burn the leaves. Some, like the sansevieria, tolerate low light.
- IrrigationAvoid overwatering. Most plants prefer to let the soil dry out before watering again. Plants like aloe vera and succulents require little water.
- Humidity: Spray the leaves of species such as ferns, peace lilies and pothos if the environment is very dry.
- Temperature: Keep plants away from cold drafts or intense artificial heat sources.
- Pots and substrates: Use porous and draining substrates to avoid waterlogging and rotten roots.
- Cleaning: Remove dust from the leaves with a damp cloth to promote transpiration and CO2 absorption.
How many plants do you need to notice a change in the air?
Although a single plant won't transform the air in a room, several medium-sized plants can have a significant impact. It's estimated that 5 to 7 medium-sized plants per 10 square meters can help maintain healthy oxygen levels and significantly reduce toxins.
Frequently asked questions about plants that oxygenate at night
- Can plants replace electric air purifiers?
They do not completely replace electrical devices, but they can significantly reduce pollutants and provide additional benefits, such as regulating humidity and improving psychological well-being.
- Can you have several species of these plants together in the same room?
Yes, combining several species enhances air purification and creates a healthier environment. Make sure each one has enough space to grow and receives proper care.
- Which plants are safe for homes with children and pets?
Some plants, such as the peace lily, can be toxic if ingested, so it's a good idea to consult before choosing a species.
- Are all CAM plants succulents?
No. Although many succulents use CAM photosynthesis, there are plants from other families that also act in this way, such as sansevieria or orchids.
- Choose aromatic plants such as lavender or basil to enhance relaxation and create a more pleasant environment.
- Clean the leaves of your plants regularly to optimize their purifying function.
- Rotate the pots occasionally so that all parts of the plant receive even light.
- Don't overcrowd bedrooms, as too many plants can increase humidity and cause problems if the room isn't well ventilated.
To incorporate plants that produce oxygen at night In the home, it not only decorates but radically transforms the quality of the environment and daily well-being. Choose your favorite species, provide proper care, and enjoy a purer, more relaxing, and more connected space with nature, especially during sleep.