NASA Study on Indoor Plants

Plants that purify the air: What NASA discovered and my experience with them

We spend most of our time indoors, whether at home or in the office, without realising the number of pollutants we breathe in daily. Formaldehyde, benzene, trichloroethylene… they sound like names from a chemistry lab, but they are actually found in furniture, cleaning products and building materials.

A few years ago, I came across a NASA study that investigated how indoor plants can help improve air quality. At that time, I had a couple of plants at home, more for decoration than anything else, but after reading about the subject, I began to pay them more attention.

Here, I share what NASA discovered and how you can use this information to make your home a healthier place.

NASA's Study: How Does It Work?

In 1989, NASA, in collaboration with the National Association of Landscape Contractors (ALCA), conducted an experiment to assess the ability of certain plants to remove air pollutants. They placed different species in sealed chambers with concentrations of substances like benzene and formaldehyde and observed how they reacted.

The result was fascinating: many plants not only beautified the spaces but also absorbed and filtered toxins from the air.

The most effective plants according to NASA

🌿 Peace Lily (Spathiphyllum) – The most elegant

This was one of my first attempts when I decided to test NASA's theory. According to the study, the peace lily is especially effective at removing benzene and formaldehyde. Not only that, but it is a plant with vibrant green leaves and elegant white flowers, perfect for adding a sophisticated touch to any corner.

In my case, I was initially worried about not knowing how to care for it properly, but it turned out to be more resilient than I imagined. It only needs moderate watering and avoiding direct sunlight. Since I've had it, I've noticed the environment feels fresher, although I'm not sure if it's autosuggestion or if it's really doing its purifying job.

🌱 Snake Plant (Sansevieria trifasciata), the indestructible

If you have ever had a plant and accidentally killed it, I understand. But the sansevieria is practically immortal. It grows in low light conditions, does not need constant watering and, according to NASA, is excellent at eliminating formaldehyde.

This plant has survived my forgetfulness about watering and the temperature changes at home without any problems. Moreover, it has a modern aesthetic that fits with any decoration. I have it in my bedroom because it also helps release oxygen at night, which is supposed to improve sleep quality.

🍃 English Ivy (Hedera helix), natural purifier

This climbing plant earned its place on NASA's list for its ability to reduce benzene and other pollutants in enclosed spaces.

At first, I placed it on a high shelf so it could hang naturally, but I didn't realise it needed more attention than other plants on the list. It needs to be watered moderately and ensure it's not in an overly dry environment. Even so, I love how it fills empty spaces and gives the house a cosy feel.

Plant Trio: Sweet Dreams

Three floors for the bedroom

101.00 €

Do They Really Work?

This is where the realistic part comes in. Yes, plants help purify the air, but they are not a miracle solution. According to the U.S. Environmental Protection Agency (EPA), although plants can remove some air pollutants, their effect is limited compared to adequate ventilation systems.

However, in my experience, having plants at home makes a big difference in the perception of the environment. They not only add freshness and colour but also give a feeling of well-being that goes beyond science. Furthermore, the simple act of taking care of them and watching them grow creates a special connection with nature.

Tips to Get Started

If you want to try the benefits of air-purifying plants at home, here are some tips:

✅ Start with a hardy plant, like the snake plant. You don't need previous experience and it practically takes care of itself.
✅ Place several plants in different spaces, especially in rooms where you spend more time.
✅ Avoid overwatering, especially in winter. Many indoor plants suffer more from too much water than from too little.
✅ Research toxicity if you have pets, some of these plants can be harmful to dogs or cats.

A small change with a big impact

You don't need to turn your house into a jungle to notice the benefits of indoor plants. With just a few well-chosen species, you can improve air quality, reduce the feeling of confinement, and transform your home into a more welcoming space.

NASA did its part with research; now it's up to us to use this knowledge to create a healthier and more pleasant environment. Are you up for trying it? 🌿