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Thymus serpyllum

Thymus serpyllum

Thyme-like scent; dry grasslands.

Creeping stems and tiny leaves.

Family
Lamiaceae
Plant type
Perennial herb
Safety level (indicative)
Generally recognised as safe
What the safety levels mean (expand legend)
  • Generally recognised as safe. Often a common herb with reasonable harvest and use; still read the specific warnings on the card.
  • Information. Primarily informational — details in the text and warnings below matter most.
  • Caution. Needs extra care (dose, duration, sensitive groups, interactions).
  • Risky. Significant risks — verify sources, contraindications and professional guidance.
  • Not for home experimentation. Not suitable to experiment with at home without knowledge and certainty.
  • High risk for internal use. Particular risk with internal use (e.g. alkaloids); avoid prolonged or irresponsible dosing.
  • Not specified. Level not filled in yet — rely on individual warnings and links below.
Thymus serpyllum — plant habitus (Wikimedia Commons).

Photograph on Wikimedia Commons (CC BY-SA 3.0).

Plant habit

Quick overview

A practical summary; details are in the sections below.

Safety grade
Generally recognised as safe·details
Scientific sources on the card
Yes — sources are listed with claims·Science section
When and what to harvest
  • Leaf — May–September
Full harvest section
Processing methods

Herbal infusion (tea), Syrup, Honey macerate, Herb bundle

All methods and recipes on the card
Topics and symptoms

Breathing comfort, Common cold — overall comfort, Cough and mucus…

Topics section · Symptoms overview

Identification and mix-ups

Creeping to procumbent subshrub in Lamiaceae, branches up to about 10–25 cm long, clothed in opposite, nearly sessile, elliptic to obovate leaves with ciliate (fringed) margins at the base. Stems four-sided, hairy on all four faces (distinguishing it from related species). Flowers small, pink-purple, in dense terminal head-like whorls. Whole plant strongly aromatic.

Possible mix-ups and risks

Most commonly confused with large thyme (Thymus pulegioides), which has stems hairy only on the angles (not on all four faces), and leaves with more numerous glands and shorter basal cilia. Garden thyme (Thymus vulgaris), grown as a culinary herb, is a more erect subshrub with distinctly smaller, revolute-margined leaves. Reliable separation of closely related Thymus species requires a combination of characters: stem cross-section hair distribution, leaf shape, and ciliate margin.

Similar herbs

  • Salvia officinalis

    Thyme and sage — often paired in the herb garden; different aromatics and safety topics.

  • Mentha × piperita

    Mint and wild thyme from the Lamiaceae; when foraging, verify the leaf whorl and the scent.

Topics and symptoms

More topics are in the symptoms and topics overview.

Sources

Geographic occurrence

  • Czechia

    Common (expected wild occurrence in the region)

    Widespread occurrence in the Czech Republic in suitable habitats.

  • Austria

    Common (expected wild occurrence in the region)

    Wave 1 (seed): broad range in Central Europe — verify with floras and national checklists.

  • Germany

    Common (expected wild occurrence in the region)

    Wave 1 (seed): broad range in Central Europe — verify with floras and national checklists.

  • Hungary

    Common (expected wild occurrence in the region)

    Wave 1 (seed): broad range in Central Europe — verify with floras and national checklists.

  • Poland

    Common (expected wild occurrence in the region)

    Wave 1 (seed): broad range in Central Europe — verify with floras and national checklists.

  • Slovakia

    Common (expected wild occurrence in the region)

    Wave 1 (seed): broad range in Central Europe — verify with floras and national checklists.

Harvest

  • LeafMay–September

    léto

    Region: Czechia

    Notes: Aerial parts/leaf before full flowering.

Storage

  • Drying(Leaf)

    Keep dried plant material in a sealed container.

    Light:
    Out of direct UV.
    Moisture:
    Low relative humidity.

Processing methods on this herb card

  • Herbal infusion (tea)(Leaf)Suitability: High suitability

    Infusion or brief extraction in hot water; usually without long boiling.

    Full method description (from the catalogue)

    In the narrow sense, “tea” often means an infusion: you pour water just off the boil over the dried plant matter and let it steep for a few minutes. Temperature, steep time, and the herb-to-water ratio change both flavour and what dissolves into the liquid.

    Compared with a decoction, heat exposure is shorter and gentler; tender leaves and flowers are often better as an infusion than with prolonged simmering. For each herb, always follow the plant card for suitable plant part, preparation, and safety notes — general rules never replace species-level judgement.

    Traditional context for this method: yes·Scientific context for this method: no

    Wild thyme infusion

    About 10 minBeginnerScience profile

    Open recipe →

  • Syrup(Leaf)Suitability: Medium suitability

    Decoction or infusion with sweetener and reduction; shelf life depends on sugar and storage.

    Full method description (from the catalogue)

    Syrups combine a herbal base with sugar or honey and often a short boil to concentrate and improve hygiene. Preservation depends strongly on water content, sugar level, and bottling practice.

    Home syrups may fall under food rules; store in the fridge after opening per recipe.

    Traditional context for this method: yes·Scientific context for this method: no

    Wild thyme syrup

    About 45 minBeginnerScience profile

    Open recipe →

  • Honey macerate(Leaf)Suitability: High suitability

    Macerating plant material in honey (a honey conserve).

    Full method description (from the catalogue)

    Honey as a maceration medium creates a viscous mixture with its own biochemistry: water activity, acidity, and enzymes influence shelf life and flavour. Traditionally it is used with delicate flowers or herbs when you want aroma bound into honey.

    Infant botulism guidance for honey and honey safety in general sit outside a single herb page; maceration time, ratios, and storage must follow a vetted recipe and source, not this general overview alone.

    Traditional context for this method: yes·Scientific context for this method: no

    Wild thyme honey

    About 30 minBeginnerScience profile

    Open recipe →

  • Herb bundle(Leaf)Suitability: High suitability

    A tied bunch of dried or fresh herb (e.g. for bath or steam).

    Full method description (from the catalogue)

    A bundle keeps material together for dipping in water, steaming over a pot, or hanging in a shower. Bundle size changes how strongly the bath water picks up compounds.

    After use, dry thoroughly or compost depending on material condition.

    Traditional context for this method: yes·Scientific context for this method: no

    Wild thyme bundle for the bath

    About 20 minBeginnerScience profile

    Open recipe →

Traditional / spiritual use

Kept separate from science — entries are cultural or symbolic, not medical advice.

Related guides in the library

  • Mountain thyme scent and low creeping mats

    General

    Traditional useFolk useHerbal lore

    Wild thyme evokes sun-warmed stones and low mats — a Mediterranean image that also fits warm slopes here. Thyme notes suggest clean air in story, not a binding medical promise.

    Form:
    čaj, koření v minulosti
    Claim strength:
    Tradition
    Source note:
    Landscape and kitchen associations.

Scientific notes

Each claim lists a study type and a source (URL or DOI) where available. Dose notes from the literature are informational only.

How to read evidence strength and study type labels

Labels summarise how the catalogue entry is tagged — they are not a medical verdict on efficacy. For every row, read the summary, limitations and source link.

Evidence strength

Evidence level not specified
The author did not grade the record; judge from the summary, limitations and source link.
Narrative / orientational literature
Descriptive or expert literature without controlled group comparison — context rather than proof of effect.
Weak evidence
Study or conclusion with major methodological limits; treat only as a pointer for further reading.
Preliminary findings
First or smaller studies — interesting direction, not the final word on efficacy or safety.
Moderate strength of evidence
Moderate strength by study design; sample and context limits still apply.
Stronger evidence
Stronger design or consistency of results within the study's stated limits.
Review article
A review summarises multiple sources; quality depends on review method and field.

Study type

Narrative / expert text
Expert text or overview without a classical study design.
In vitro study
Cell culture or test-tube experiment — does not show an effect in the body.
Animal study
Animal model — transfer to humans is not automatic.
Observational study
Observing groups without random treatment assignment; confounding is possible.
Clinical trial
Human clinical trial; sample size and control group matter.
Randomised controlled trial
Randomised controlled trials are among the stronger designs when well conducted.
Review study
A review aggregates multiple papers — quality depends on selection rules.
Systematic review
Systematic review with explicit search and selection methodology.
Meta-analysis
Statistical pooling of studies; outcome depends on input data and heterogeneity.
Regulatory assessment / monograph (EMA, WHO…)
Regulatory body summary for a herbal product — different context from a single RCT; often about products, not home tea.
Expert monograph (herbal preparations)
Structured literature summary for a plant or drug — quality depends on author and edition year.

  • Thyme and thymol appear in respiratory product research and preservative studies; kitchen culinary doses are far below trial extracts.

    Evidence level not specifiedNarrative / expert text

    Limitations: Airway trials often use extracts, not tea; thyroid and seizure medication interactions are discussed for concentrated thymol exposure.

    Reference into the scientific literature (orientation)

  • The EMA HMPC monograph for common thyme aerial parts; wild thyme is a related Thymus species — the document is the closest public regulatory parallel to an aromatic herb tea.

    Review articleRegulatory assessment / monograph (EMA, WHO…)Year: 2013

    Preparation form in the study: infusion

    Active compound / focus: thymol, carvacrol (generally in Thymus)

    Limitations: Do not equate species differences automatically; skip with a Lamiaceae allergy.

    Dose note (from literature): See the PDF for preparations.

    EMA Committee on Herbal Medicinal Products (HMPC) — European Medicines Agency

    EMA: Final assessment report on Thymus vulgaris L. and Thymus zygis L., herba

Images

The main photo is in the card header. More images will appear here when available.

Safety

What the warning types mean

The type on each warning helps group themes — it does not replace the separate severity badge.

Internal use
Risks from swallowing, extracts, duration of use or concentration for internal use.
Interactions / medicines
Possible effect on medicines or concurrent treatment — check sources and a professional.
Raw plant parts
Raw, unripe or poorly prepared plant parts can be dangerous.
Toxins and regulation
Toxic constituents or regulated compounds (e.g. in distillates).
Contact with the plant
Skin or mucosa irritation from contact with fresh plant or sap.
Allergy
Allergic reactions, often linked to family sensitisation.
Harvesting and contamination
Contamination, species mix-ups or harvesting from unsuitable places.

No structured safety records yet.