Can Hydroponic Plants Absorb Formaldehyde? Which Plants Are Good at Removing Formaldehyde?

Many people who have just finished renovating their homes like to place a few hydroponic plants, feeling they are clean and can remove formaldehyde. But is this really reliable? Today let's talk about those plants that are often mentioned.

Actually, whether soil-cultured or hydroponic, the principle by which plants absorb formaldehyde is much the same, mainly relying on the stomata on the leaves and the root system. However, hydroponics has a small characteristic: its roots are submerged in water, which theoretically can dissolve a little formaldehyde through the water, but the effect is really very limited. For example, it's like using a cup of water to dilute the smell of an entire room - the effect is minimal. So don't expect that placing a few bottles of hydroponic plants will "eat up" all the formaldehyde. They are more like supporting players. To remove formaldehyde, ventilation is the way to go.

So which plants have relatively reliable formaldehyde-absorbing ability? That brings us to our three main characters today.

Dwarf Umbrella Tree (Schefflera arboricola):The Dwarf Umbrella Tree is also known as the Hawaiian schefflera, with leaves shaped like little palms, growing in clusters that look especially lively. It's not only good-looking, but its ability to absorb formaldehyde is above average among green plants. Moreover, this plant is very tough; even if you occasionally forget to water it, it won't easily wilt, making it suitable for beginners. However, note that the Dwarf Umbrella Tree likes diffused light, so don't expose it to direct sunlight, otherwise the leaf edges can easily burn.

Bird's Nest Fern (Asplenium nidus):The Bird's Nest Fern grows in a truly grand manner, with leaves like split feathers that can spread out to half a meter wide, giving the living room a very stylish look. Its leaf surface area is large, so its formaldehyde absorption efficiency is naturally a bit higher. The Bird's Nest Fern likes a humid environment; if hydroponic, you need to change the water frequently to keep the water clean, otherwise the roots can easily rot. Also, it's afraid of the cold, so in winter the room temperature should not be below 10 degrees, otherwise it can easily get frostbitten.

Golden Diamond Green Princess (Dieffenbachia):The Golden Diamond Green Princess has deep green, glossy leaves that feel thick and textured. Although its ability to absorb formaldehyde is not as good as the previous two, its advantage is a broader range of air purification. Besides formaldehyde, it can also handle harmful gases like benzene and ammonia to some extent. The Golden Diamond Green Princess is especially shade-tolerant, so it's fine to place it in the bathroom or bedroom. When hydroponic, don't let the water level get too high; just half-covering the roots is enough, otherwise the roots can easily suffocate.

These plants absorb formaldehyde as a slow, steady process, so don't expect them to show immediate results. If your home has just been renovated, it's best to open the windows for ventilation more often, and pair that with "heavy hitters" like activated carbon and air purifiers. Plants are mainly used to decorate the environment and make people feel comfortable, while helping out a little on the side. Choose one you like and take good care of it - it can both please the eye and slightly purify the air.