Does singing help plants grow?

Caveats up front: I am not a botanist, and I don’t claim to have the world’s greenest thumb. But it must be said, I’ve had a lot of success with house plants over the last few years.

Earlier this week I was chatting with a client about the plants in my studio. They commented how the plants were enormous, and looked lusher everytime they saw them. It led to us chatting about why that might be.

The studio does get decent natural light, it’s kept at a comfortable temperature, and I do remember to water them. I also have a nice artificial light source in their vicinity for evening light. But truthfully, ideal light and watering are just a standard baseline. It got us thinking about the rather unique environment these plants actually live in.

For five to ten hours a day, they are subjected to a barrage of singing and music. Vocal exercises, sirens, scales, all manner vowels, piano, guitar, classic albums, and the full dynamic spectrum of voices working to find their balance.

Now, initially my reaction to the idea of the idea that music helps plants to grow is that it’s a bit of an old wives’ tale. So I decided it might be interesting to do a bit of digging into what the evidence says. And surprisingly, I discovered that the idea of singing to plants actually sits at a fascinating intersection of biophysics, microchemistry, and human respiration.

If you’ll indulge a slight detour from my usual vocal technique articles, here is why a singing studio might just be the ultimate indoor greenhouse.

1. Acoustic Mechanoreception (Sound as Physical Vibration)

When singers come in for a session, we spend a lot of time talking about resonance, vocal balance, and acoustic energy. We often forget that sound is not just an auditory experience. This is also a physical, mechanical pressure travelling through the air.

Plants, obviously, do not have ears. But they are finely tuned mechanical sensors.

When subjected to sustained sound waves, plant cells respond to this mechanical stress via mechanosensitive ion channels in their cell membranes. Research from institutions like the National Institute of Agricultural Biotechnology in South Korea has shown that sound waves—particularly those between 100 Hz and 1,000 Hz—can actually upregulate gene expression in plants. This acoustic stimulation increases cytoplasmic streaming (the movement of nutrients within the cells) and elevates levels of protective enzymes.

Furthermore, unlike ambient street noise or the erratic chatter of a television, good vocal technique produces this same sustained, resonant fundamental frequencies and rich harmonic overtones. In a way, when we are fixing vocal balance in a session, we are inadvertently giving the plant cell walls a highly specific, constructive physical massage.

So when a singer finds that upper partial “bite” or deep harmonic warmth, they are generating a consistent, rhythmic acoustic frequency. In lab settings, plants exposed to harmonic acoustic frequencies consistently fare better than those subjected to jarring white noise.

2. The Respiration Factor

While the acoustics are fascinating, there is a much more grounded, biological truth at play here. This is arguably the most potent and overlooked factor in the studio.

Ambient outdoor air typically sits at around 420 parts per million (ppm) of carbon dioxide. But consider what actually happens during a singing lesson. You have a coach and a student, both engaging in active, diaphragmatic breathing. Deep, expansive breaths and producing prolonged, controlled exhalations.

When you do this for hours on end in an relatively enclosed space room, the indoor carbon dioxide levels naturally climb, often reaching 800 to 1,200 ppm. For common tropical houseplants—like the monstera and pothos sitting in my studio—this is essentially a natural greenhouse carbon-fertilization regime. Increased CO2 availability directly accelerates their photosynthetic glucose production. Quite literally, they are feasting on our breath support.

Alongside the carbon dioxide, there is the humidity. Vigorous vocalising expels a significant amount of aerosolised moisture. Tropical foliage can struggle in the dry, artificially heated air of a British winter. But two people consistently projecting their voices raises the local relative humidity just enough to keep those leaf margins from crisping up.

3. The Science and the Lore

It is always fun to look at where the folklore meets the science, because this isn’t an entirely new observation.

In 2009, the Royal Horticultural Society ran a month-long trial exposing tomato plants to different spoken voices. All the “voiced” plants outgrew the silent control group. Interestingly, the plants read to by female voices grew significantly taller than those read to by male voices. The RHS hypothesized that this growth was linked to how the higher pitch and frequency spectrum interacted with the plants’ internal fluid movement.

More recently, in 2019, researchers at Tel Aviv University demonstrated that evening primroses could literally “hear” the acoustic vibrations of approaching pollinator wings. Within three minutes of detecting the specific frequency of a bee, the flowers temporarily increased the sugar concentration of their nectar by 20%.

Plants aren’t just inert pieces of decoration, they are active acoustic responders. It gives a whole new context to the famous (if slightly unscientific) 1973 experiments by Dorothy Retallack, who claimed her plants leaned toward classical music and withered away from abrasive rock. While modern botanists might raise an eyebrow at her methodology, the idea that plants react to harmonic acoustic environments has proven remarkably prescient.

Conclusion: An Accidental Symbiosis

Ultimately, I am not suggesting that human singing is a magical fertilizer, nor am I suggesting that you should replace your plant food with playing CDs the whole day while you are out. But I do find a beautiful poetry in how it all connects.

That in working on our voices, singing and enjoying music, the plants are benefitting from it just as much as we are. It’s a nice reminder that our voices have a tangible, physical impact on the space around us, sometimes in ways we can actually see growing before our eyes.

If this is something you’d like to explore in your own voice, for your own benefit as much as for your plants, please do book in using the big red button below.