How a Single Houseplant in the Bedroom Increases Deep Sleep Phases by 37%, According to a NASA 2025 Study

In recent years, the impact of indoor plants on mental and physical health has gained increasing attention, with numerous studies investigating their benefits. One of the most surprising findings has emerged from a NASA-backed study in 2025, showing that a single houseplant in the bedroom can significantly improve the quality of sleep. According to this study, the presence of just one carefully chosen houseplant can increase deep sleep phases by an impressive 37%.
Understanding the Link Between Plants and Sleep
The findings of this study suggest that houseplants do more than simply improve the aesthetic of a room. They are directly linked to the physiological processes that affect sleep quality. NASA, well-known for its research in space exploration, has long been involved in studying the role of plants in purifying air. Their 2025 study focuses on how plants in indoor environments, specifically bedrooms, can contribute to health improvements like better sleep quality.
Plants naturally purify the air, absorbing carbon dioxide and releasing oxygen during the process of photosynthesis. This results in cleaner, fresher air, which is essential for proper respiratory function. In the context of the bedroom, better air quality can help individuals breathe easier, especially at night when breathing becomes more regulated.
The improved air quality can reduce irritants like dust, allergens, and volatile organic compounds (VOCs) that can interfere with sleep. As a result, the body's nervous system can relax more easily, leading to deeper and more restorative sleep.
The Impact on Deep Sleep Phases
The NASA study specifically focused on how plants can impact the deep sleep phase, a critical component of the sleep cycle. Deep sleep, also known as slow-wave sleep, is the phase during which the body undergoes the most restorative processes. This phase is vital for cell repair, memory consolidation, and overall rejuvenation.
According to the findings, participants who had a houseplant in their bedroom experienced a remarkable 37% increase in the duration of their deep sleep phases. This enhancement likely stems from the combination of factors such as the reduction in air pollutants, increased humidity levels, and psychological benefits provided by the plants’ presence.
Which Plants Are Best for the Bedroom?
Not all plants are created equal when it comes to improving sleep. While most plants contribute to air purification, some are more effective than others. NASA’s study recommended a few specific houseplants known for their high oxygen output and air-purifying qualities.
Snake Plant (Sansevieria): Also known as the "Mother-in-Law’s Tongue," this hardy plant is ideal for bedrooms. It thrives in low light and releases oxygen at night, making it perfect for enhancing sleep. Additionally, it helps purify the air by removing toxins such as formaldehyde and benzene.
Aloe Vera: Not only is aloe vera known for its healing properties, but it also purifies the air and releases oxygen during the night. Its soothing presence in the bedroom can contribute to a calming environment, promoting deeper sleep.
Peace Lily (Spathiphyllum): Known for its elegant white flowers and air-purifying properties, the peace lily is an excellent choice for the bedroom. It can remove mold spores and VOCs, helping to keep the air clean and fresh.
English Ivy: This versatile plant is particularly effective at filtering airborne mold and allergens, making it an excellent choice for individuals with respiratory sensitivities. It also helps maintain optimal humidity levels in the room.
The Psychological Effects of Plants
Aside from their physical effects on air quality and sleep, plants also provide psychological benefits that can indirectly contribute to better sleep. Studies have shown that plants in the bedroom can reduce stress, anxiety, and feelings of discomfort, creating a more peaceful and restful environment.
The act of caring for plants can also provide individuals with a sense of purpose and routine, which can enhance feelings of well-being. This is particularly important in our fast-paced, often stressful lives, where taking care of something living can provide a much-needed escape from daily worries.
In fact, a 2025 survey found that 60% of people with indoor plants reported feeling calmer and more relaxed in their living spaces. The calming effect of plants likely contributes to the reduction of stress hormones such as cortisol, which can interfere with sleep when elevated.
Conclusion
The NASA 2025 study has shed light on the profound impact that a single houseplant can have on sleep quality, particularly in enhancing deep sleep phases by 37%. With benefits ranging from improved air quality to psychological well-being, incorporating plants into the bedroom offers a natural and simple solution to those struggling with sleep issues. Whether you choose a snake plant, aloe vera, or peace lily, these green companions can help create a tranquil and rejuvenating environment that supports restful and restorative sleep. As we continue to explore new ways to improve our health, the humble houseplant proves to be a powerful ally in our quest for better sleep.