For centuries, people around the world have practiced a simple but surprisingly powerful remedy: inserting whole cloves into an onion and placing it in the home, bedroom, or near sick family members.
At first glance, it seems too easy – almost too unusual – to be effective. But this traditional method is rooted in chemistry, herbal medicine, and generations of observation.
When cloves are inserted into an onion, the two ingredients work together to release antimicrobial compounds, purify indoor air, support respiratory health, repel pests, and enhance overall wellness.
Modern research now confirms that onions and cloves both contain some of the strongest natural antibacterial, antiviral, and anti-inflammatory compounds found in plants. When combined, they create a synergy that amplifies their healing properties.
Here is the science and the benefits behind this age-old home remedy – and why so many people still use it today.
Why the Onion-and-Clove Remedy Works So Well
Both onion and cloves are medicinal plants rich in potent aromatic compounds.
Onions contain:
- sulfur compounds (allicin-like components)
- flavonoids (especially quercetin)
- natural antibacterial molecules
- antioxidants
- mucus-clearing vapors
Cloves contain:
- eugenol (a natural antiseptic and antimicrobial)
- powerful essential oils
- antifungal and antiviral compounds
- antioxidants
- aromatic vapors that purify air
When cloves are inserted into an onion, the moisture inside the onion hydrates the cloves, allowing them to slowly release their essential oils.
The onion warms naturally at room temperature, acting like a diffuser that spreads the scent and medicinal molecules throughout the room.
This combination creates a natural, continuous release of cleansing vapors – without electricity, chemicals, or synthetic fragrances.
1. It Helps Purify Indoor Air Naturally
Putting cloves in an onion creates a natural air purifying “device.” The combination releases plant-based antimicrobial compounds that may help reduce airborne bacteria, unpleasant odors, and stale indoor air.
Benefits include:
- fresher-smelling rooms
- less musty odor
- cleaner-feeling environment
- reduced presence of odor-causing microbes
Before modern ventilation, this was one of the earliest methods families used to cleanse enclosed spaces – especially during illness or winter months.
2. It Supports Respiratory Health and Clears Airway Passages
Both cloves and onions release vapors that have expectorant (mucus-clearing) properties.
This is one reason families traditionally placed a clove-studded onion beside the bed of someone with a cold, cough, or congestion.
The aromatic compounds may help:
- loosen mucus
- ease nasal congestion
- support clearer breathing
- reduce nighttime coughing
- soothe irritated sinuses
Even though it does not replace medical care, many people notice easier nighttime breathing when a clove-inserted onion is placed in the room.
3. The Combination May Help Reduce Airborne Viruses and Bacteria
The vapor from cloves and onions contains active molecules such as eugenol and quercetin, both known for their antimicrobial properties. These compounds help inhibit the growth of:
- bacteria
- mold spores
- some viruses
- fungi
This explains why clove-studded onions were used historically during epidemics, illness outbreaks, and cold seasons.
Modern studies show that:
- Eugenol (from cloves) is effective against multiple pathogens.
- Sulfur compounds (from onions) inhibit harmful microbes and support immune defense.
Together, they form a botanical shield that cleanses the air in a gentle, natural way.
4. It Helps Absorb Odors and Freshen the Home
Onions naturally absorb odors, and cloves add an aromatic, spicy scent. When cloves penetrate the onion, the fragrance spreads gradually and helps neutralize:
- cooking smells
- cigarette smoke
- mildew
- pet odors
- household odors
Many people use this method in kitchens, basements, bathrooms, or bedrooms to keep the air clean and fresh without sprays or synthetic chemicals.
5. It Helps Repel Insects and Pests
Cloves are known to repel pests due to their strong essential oil aroma, especially eugenol. Onions have a pungent scent that insects dislike as well.
Together, they help deter:
- mosquitoes
- fruit flies
- ants
- moths
- flies
- some spiders
This makes the clove-onion combination ideal for outdoor seating areas, kitchens, and pantries.
6. It Creates a Calm, Healing Atmosphere in the Home
Aromatic compounds affect the nervous system. The scent of cloves has traditionally been used to reduce stress, promote mental clarity, and ease tension.
Onions, when cut, release molecules that help open the sinuses and promote easier breathing.
People often report:
- feeling calmer
- breathing more deeply
- sleeping more comfortably
- reduced nighttime restlessness
This makes the remedy especially popular in bedrooms and relaxation spaces.
7. It Supports the Body During Colds, Coughs, and Congestion
Even if not consumed, the vapors from cloves and onions are believed to support the body during respiratory discomfort. When placed near someone who is sick, the combination may:
- help thin mucus
- reduce stuffiness
- ease nighttime coughing
- support faster recovery
- create a cleansing environment
This method has been passed down through generations because it provides relief without medication, making it especially useful for children.
8. The Combination Helps Reduce Mold and Microbial Growth
Mold thrives in damp, stagnant air. The antimicrobial vapors released from cloves and onion help discourage mold growth and reduce mold spores in the air.
While not a replacement for cleaning, placing cloves in an onion may help:
- protect closets
- keep storage rooms fresher
- reduce moisture odors
- discourage mold in bathrooms or basements
This remedy is ideal for homes in humid or rainy climates.
9. It Acts as an All-Natural Home Air Freshener
Unlike commercial air fresheners that contain artificial fragrances and chemicals, the onion-and-clove remedy is 100% natural and safe.
A clove-studded onion emits:
- a warm, spicy aroma
- a comforting herbal scent
- gentle, earthy undertones
- a cleansing fragrance
It doubles as both a functional remedy and a natural home fragrance.
10. It Helps Reduce Dust Mites and Micro Irritants
Cloves contain compounds that repel mites and other microscopic pests. Onions release sulfur vapors that may help inhibit the activity of dust-based microbes.
A clove-inserted onion placed near:
- mattresses
- bedding
- carpets
- closets
…may help reduce irritants that trigger sneezing or nighttime symptoms.
11. It Symbolically Represents Protection in Many Cultures
Beyond the science, cloves and onions have long been used symbolically to ward off negativity, illness, and “bad air.”
Even without spiritual beliefs, many people use this remedy to create a feeling of safety, comfort, and renewal in their homes.
The symbolism includes:
- cleansing spaces
- renewal of energy
- protection from illness
- welcoming positive energy
Whether literal or symbolic, this creates a mentally soothing environment.
How to Make a Clove-Inserted Onion Remedy
The process is simple, traditional, and takes only a few minutes.
How to prepare it:
- Peel an onion halfway or leave the skin on.
- Insert several whole cloves into the onion.
- Place it in a bowl, jar, or small plate.
- Position it in the room where you want cleansing or respiratory support.
The scent intensifies over time as the onion releases moisture into the cloves.
Best places to use it:
- bedroom nightstands
- kitchen counters
- living rooms
- windowsills
- children’s rooms (placed safely out of reach)
- near sick beds
- near entryways to purify air
Replace the onion every 3–7 days depending on humidity and smell.
Putting cloves into an onion may sound simple, but this ancient remedy carries powerful benefits supported by both tradition and modern science.
