marjoram
Enable an agent to identify material registered as marjoram, assess its living or harvested condition, and choose supported cultivation, handling or culinary actions.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
Researched by: Codex + Grok
Purpose and description
Enable an agent to identify material registered as marjoram, assess its living or harvested condition, and choose supported cultivation, handling or culinary actions.
Origanum majorana L. (Lamiaceae; syn. Majorana hortensis Moench) is a tender perennial or annual mint native to Cyprus and southern Türkiye and cultivated worldwide as sweet marjoram, a culinary and traditional medicinal herb whose leaves yield a sabinene-hydrate and terpinen-4-ol essential oil rather than the carvacrol-dominated oil of oregano.
It can be Identify or flag uncertain marjoram material using botanical observations and provenance; Adjust watering, placement or protection using the plant's condition and growing exposure; Select suitable living material for propagation and track its establishment; Harvest leaves or shoots for a specified purpose while recording the source plant and growth stage; Dry, separate, package and store harvested herb while retaining batch identity; Select marjoram for a culinary role, or hold unsuitable or insufficiently identified material.
Distinguishing features
Check the botanical identification behind the common name: sweet marjoram is associated with Origanum majorana, while pot marjoram may refer to O. onites; a marjoram label alone does not settle species. [RHS marjoram guide](https://www.rhs.org.uk/herbs/marjoram/grow-your-own?type=h)
Compare intact leaves against authenticated sweet-marjoram material for the combination of oval shape, soft hairs and grey-green colour; treat this as supporting evidence rather than a sufficient identification. [RHS species description](https://www.rhs.org.uk/plants/11919/origanum-majorana/details)
Compare aroma with authenticated marjoram and oregano references: a milder, sweeter profile supports marjoram identification, but sensory comparison alone cannot authenticate it. [RHS oregano guide](https://www.rhs.org.uk/herbs/oregano/grow-your-own)
For fragmented or dried material, test whether traceable plant identification or an appropriate authentication method supports the label when leaf and flower characters cannot be inspected.
Scope
+ Botanical identity and evidence distinguishing marjoram from oregano and other similarly named herbs
+ Living marjoram plants, their growth stage and cultivation condition
+ Harvested marjoram leaves and shoots in fresh or dried form
+ Harvest origin, processing history and continuity between plant and herb batch
+ Aroma, physical integrity and evidence supporting handling or culinary use
- General taxonomy and descriptions of neighbouring Origanum species
- Soil, growing containers and greenhouse systems as independent things
- Recipes, prepared foods and mixed seasonings containing marjoram
- Extracted essential oils and formulated medicinal products
- Commercial orders, certification systems and food-safety policies themselves
Characteristics
- Botanical identity assessment
- Named taxon or unresolved; evidence and confidence recorded separately Determines whether marjoram-specific care and use assumptions apply.
- Physical form
- Rooted plant, cutting, fresh shoot, fresh leaf, dried whole leaf, dried fragmented herb Selects the relevant observations and available actions.
- Plant-part composition
- Percentage by mass of leaves, stems, flowers and foreign material; sampling basis stated Distinguishes usable leaf material from stem-heavy or mixed material.
- Growth and flowering stage
- Establishing, vegetative, budding, flowering, post-flowering, declining or unknown Supports decisions about care, propagation and harvest timing.
- Leaf and shoot condition
- Observed turgor, discolouration, lesions, pest damage and dieback, with extent Makes deterioration visible without treating symptoms as a confirmed diagnosis.
- Growing exposure
- Temperature in °C, light exposure in hours per day, and substrate moisture with method and units Provides evidence for location-specific watering and protection decisions.
- Aroma profile
- Descriptors and intensity relative to a named reference, with assessment method Supports culinary matching and detection of changed or atypical herb quality.
- Harvest and processing lineage
- Links to source plant or lot, harvest event, drying event and subsequent splits or mixtures Carries identification and treatment evidence into harvested material.
- Water activity of dried herb
- aw, dimensionless, with instrument, temperature and sampling details Supports assessment of drying and storage against an applicable validated criterion.
- Use disposition
- Pending assessment, supported for specified use, restricted or rejected; basis recorded Separates attractive appearance or aroma from evidence permitting a particular action.
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 6 bundles · 11 layers · 18 findings · 38 questions.
Marjoram identity Establish what the marjoram name denotes for the observed plant or herb batch.
Common-name ambiguity can otherwise transfer the wrong cultivation or culinary assumptions to the material.
Name and taxon
Separate the supplied name from the supported botanical identification.
Supported marjoram identification
Record the claimed taxon, identification evidence and unresolved alternatives.
- Does marjoram here mean identified sweet marjoram, another named taxon or an unresolved trade name? definition
- Who identified the source material, by what method and with what retained evidence? provenance
- Does the proposed identification fit this registry entry or require a link to a neighbouring entry? boundary
Observable authentication
Assess the identification evidence available in intact and processed material.
Diagnostic evidence
Record leaf, flower and aroma observations without treating any single cue as proof.
- Which observed leaf and flowering characters agree with an authenticated reference for the claimed marjoram taxon? measurement
- Has fragmentation or drying removed the characters needed to distinguish this material from oregano or another herb? boundary
- What additional examination is needed before accepting the identification? action
Living marjoram condition Represent the development and growing condition of rooted plants and propagating material.
Care and harvest decisions depend on the actual plant, its establishment and its environment.
Growth and regrowth
Track development relevant to cutting, propagation and continued growth.
Plant development
Record rooting, shoot development, flowering and recovery following cuts.
- Is this marjoram an unrooted cutting, establishing plant or established plant, and what supports that assessment? measurement
- What budding, flowering and new-shoot growth are visible, including regrowth since the previous cut? measurement
- Does the observed development support propagation or harvest now, or should the plant recover first? action
Growing stress
Relate visible symptoms to measured exposure and care history.
Stress and care response
Record marjoram leaf and shoot symptoms alongside environmental evidence and remaining diagnostic uncertainty.
- What proportion of leaves or shoots shows wilting, discolouration, pest damage or dieback? measurement
- What recent temperature, watering, drainage and light conditions preceded these symptoms? provenance
- What care adjustment is supported for the identified taxon and local conditions, and what response should be checked? action
Harvest and material continuity Connect harvested marjoram to its source and describe the herb actually retained.
Identification and cultivation history must remain usable after leaves leave the plant.
Harvest context
Capture the origin and circumstances of leaf or shoot removal.
Traceable marjoram harvest
Record source identity, harvest time, plant stage and intended destination.
- Which identified plants or supplier lot produced this marjoram, and when was it harvested? provenance
- What plant parts were taken, at what flowering stage and in what quantity? measurement
- Is this harvest intended for fresh use, drying or propagation? action
Herb composition
Describe retained plant parts and changes to batch identity.
Leaf content and mixtures
Record leaf, stem and flower content, foreign material, and any combination of source lots.
- What sampled proportions of this material are marjoram leaves, stems, flowers or foreign matter? measurement
- Which source lots were combined or separated, and can their identity evidence still be traced? provenance
- Does the material remain identifiable marjoram herb, or has it become a seasoning mixture owned by another model? boundary
Postharvest marjoram quality Assess fresh and dried herb condition through handling and storage.
Harvested marjoram needs different observations from a living plant, especially for aroma retention and moisture-related deterioration.
Fresh herb condition
Assess the physical and sensory condition of recently harvested leaves and shoots.
Fresh leaf usability
Record wilting, bruising, discolouration and atypical odour with elapsed time and handling history.
- How much of the fresh marjoram is wilted, bruised, discoloured or otherwise visibly deteriorated? measurement
- What elapsed time and storage conditions separate harvest from this assessment? provenance
- Does the evidence support fresh use, prompt drying or holding the material for further assessment? action
Dried herb condition
Assess drying outcomes and changes during storage.
Drying and aroma retention
Record the drying process, measured moisture condition and aroma change against a stated reference.
- What drying method, duration and temperature history produced this dried marjoram? provenance
- What do representative water-activity measurements, aroma comparisons and physical inspection show? measurement
- Do applicable acceptance criteria support packaging or continued storage, or require holding or rejecting the batch? action
Marjoram use decisions Connect the identified herb and its assessed condition to a specific proposed use.
An agent must distinguish culinary suitability from unresolved identity, treatment or contamination concerns.
Culinary fit
Describe whether the available marjoram suits the requested ingredient role.
Form and aroma match
Record the required herb form and sensory target without assuming a universal substitution ratio.
- Does the intended use require fresh leaves, whole dried leaves or fragmented dried marjoram? definition
- How does this batch's aroma intensity compare with the reference used for the intended preparation? measurement
- If replacing fresh marjoram, dried marjoram or oregano, what preparation-specific evidence supports the substitution and amount? action
Use evidence and restrictions
Retain the evidence and unresolved issues governing release for a specified use.
Supported use disposition
Record relevant treatment history, contamination assessments and the basis for accepting or withholding the herb.
- What source records establish whether this marjoram was grown and handled for culinary use, including relevant treatments? provenance
- Which identity or contamination uncertainties remain unresolved despite acceptable appearance and aroma? boundary
- Under the applicable use criteria, should the material be released, restricted, held for assessment or rejected? action
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Kinds and varieties
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Sweet or knotted marjoram: the cultivated garden herb of O. majorana, cut as it begins to flower
- Dried sweet marjoram: the spice-trade product of dried leaves and flowering tops, whole or cut
- Ground or powdered dried marjoram: the milled spice, sometimes with permitted anticaking agents
- Origani majoranae herba: the herbal-drug form (comminuted herb for tea; extracts for cutaneous use)
- Marjoram essential oil: steam-distilled oil of the flowering herb
- Sabinyl chemotype: the usual sweet type, dominated by cis-sabinene hydrate and terpinen-4-ol
- Carvacrol chemotype of O. majorana: the Turkish 'beyaz kekik' (white oregano) type, oil-rich and oregano-like
- Linalool chemotype: a floral oil type that still carries substantial carvacrol
- Which of these kinds and varieties hold for the sense of marjoram this model covers, and on what evidence? provenance
Identifiers and schemes
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Wikidata - Q22694 - Item labelled marjoram / Origanum majorana
- IPNI / POWO - 453303-1 - LSID urn:lsid:ipni.org:names:453303-1
- WFO - wfo-0000260658 - World Flora Online taxon
- EPPO Code - MAJHO - Origanum majorana
- GBIF - 2926615 - Species key used by Pl@ntNet and GBIF
- NCBI / UniProt taxonomy - 268884 - Origanum majorana
- MeSH - M0397171 - NLM heading for the plant
- Linnaean binomial - Origanum majorana L. - Sp. Pl.: 590 (1753); synonym Majorana hortensis Moench used in US food law
- Which of these identifiers and schemes hold for the sense of marjoram this model covers, and on what evidence? provenance
Standards and regulation
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Codex Alimentarius / CCSCH: draft Standard for Dried Sweet Marjoram (CX/SCH 25/8/7, Step 3/4 as of 2025), defining the product as dried Origanum majorana L.
- US FDA: 21 CFR 182.10 lists 'Marjoram, sweet' (Majorana hortensis Moench) as a GRAS spice, distinct from pot marjoram
- EMA Committee on Herbal Medicinal Products: EU herbal monograph on Origanum majorana L., herba (EMA/HMPC/166517/2015) for traditional herbal tea and cutaneous preparations
- European Commission: Regulation (EU) 2023/915 sets a maximum of 1,000 μg/kg pyrrolizidine alkaloids in marjoram (higher than the 400 μg/kg default for most dried herbs)
- Codex CXC 74-2014: Code of Practice for Weed Control to Prevent and Reduce Pyrrolizidine Alkaloid Contamination in Food and Feed, cited by the draft marjoram standard
- Codex CXS 193-1995 and CXS 192-1995: contaminant and food-additive frameworks applied to dried sweet marjoram; anticaking agents only in the ground form
- Which of these standards and regulation hold for the sense of marjoram this model covers, and on what evidence? provenance
Real-world use
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Dried or fresh leaves used to season lamb, vegetables, soups, stews, salad dressings, sauces, sausages (German Wurstkraut) and herbal teas
- Tops cut as plants begin to flower and dried slowly in the shade for the spice trade
- Garden herb grown as an annual north of about USDA zone 9, often in pots because it can spread under warm conditions
- Traditional herbal tea of the comminuted herb and a 1:5 ethanolic extract in white petroleum jelly for cutaneous use (EU monograph)
- Essential oil distilled from the flowering herb for flavouring and aromatherapy; sabinyl oil is the usual sweet type
- In southwestern Türkiye the carvacrol chemotype of the same species is commercialised as beyaz kekik (white oregano)
- Which of these real-world use hold for the sense of marjoram this model covers, and on what evidence? provenance
Typical measurements
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Plant height - up to 0.8 - m
- Leaf blade size - 3-35 × 2-30 - mm
- Calyx length - 2-3.5 - mm
- Terpinen-4-ol in sweet-type essential oil - 20-40 - %
- cis-Sabinene hydrate in Turkish sweet (mercanköşk) oil - 24-44 - %
- Carvacrol in the carvacrol chemotype of O. majorana - often >76 - %
- EU maximum pyrrolizidine alkaloids in marjoram - 1000 - μg/kg
- Which of these typical measurements hold for the sense of marjoram this model covers, and on what evidence? provenance
Failure modes and hazards
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Misidentification or mislabelling as oregano (or the reverse), including sale of O. vulgare as 'wild marjoram'
- Chemotype mismatch: carvacrol-type O. majorana is pungent, a possible dermal and mucous-membrane irritant, and is treated more cautiously in pregnancy, lactation and children than sabinyl sweet marjoram
- Pyrrolizidine-alkaloid contamination from co-harvested weeds; marjoram is on the EU high-limit list because of this risk
- Cold kill: the true culinary plant is not reliably perennial outside warm-temperate zones and is lost as a winter crop in much of Europe and North America
- Reported toxicity to pets (extension literature); keep herb and oil away from companion animals
- Flavour collapse if the fresh herb is overcooked; dried spice also fades if stored warm or in light
- Ready hybridisation with other Origanum species, so seed-grown or mislabelled plants may not keep the sweet-marjoram profile
- Which of these failure modes and hazards hold for the sense of marjoram this model covers, and on what evidence? provenance
Regional variation
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- In some Middle Eastern usage 'marjoram' is treated as synonymous with oregano; 'sweet marjoram' or 'knotted marjoram' is then used to mark O. majorana
- In English and German horticulture 'wild marjoram' usually means O. vulgare (oregano), not O. majorana
- Turkey distinguishes mercanköşk (sabinyl sweet marjoram, western Anatolia, oil-poor) from beyaz kekik (carvacrol O. majorana of the southwest, traded as white oregano)
- German Wurstkraut and French marjolaine / marjolaine à coquille name the sausage and knotted culinary herb; Spanish mejorana is also applied more loosely to origanums
- The species is native only in Cyprus and southern Türkiye; it is widely cultivated and only patchily naturalised around the Mediterranean and beyond
- Which of these regional variation hold for the sense of marjoram this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Oregano / wild marjoram (Origanum vulgare, especially subsp. hirtum) - Oregano oil is cymyl-type (carvacrol and/or thymol); sweet marjoram oil is sabinyl-type (cis-sabinene hydrate, terpinen-4-ol). Leaves of marjoram are softer and greyer; oregano is typically hardier and more pungent.
- Pot marjoram / Turkish or Cretan oregano (Origanum onites) - A different species (US food law lists it separately as Majorana onites). More peppery, fully perennial in Mediterranean climates; not the sweet knotted herb of O. majorana.
- Hardy or Italian marjoram (Origanum × majoricum) - A hybrid of O. majorana × O. vulgare subsp. virens, often sold as a winter-hardy 'marjoram'; oil is similar to sweet marjoram but the plant is not pure O. majorana.
- Thyme (Thymus spp.) - Thyme oil is typically thymol-dominant; sweet marjoram is terpinen-4-ol / sabinene-hydrate dominant with only traces of thymol and carvacrol.
- Mexican oregano (Lippia graveolens and related Verbenaceae) - Not an Origanum; identified by verbenaceous (not mint-family) morphology and a mixed carvacrol-thymol oil unlike sabinyl marjoram.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of marjoram this model covers, and on what evidence? provenance
Sources
- Origanum majorana L. - Accepted name, synonyms, native range (Cyprus, southern Türkiye), habit to 0.8 m, leaf size, culinary and medicinal use
- Marjoram - Culinary uses, Middle Eastern synonymy with oregano, knotted/sweet/pot vernaculars, harvest at flowering
- Origanum majorana (MAJHO) - EPPO code, distinction from wild Origanum vulgare also called marjoram, vernacular names
- sweet marjoram | Taxonomy - Crosswalks to Wikidata Q22694, IPNI, WFO, UniProt taxonomy, MeSH, Foodb
- 21 CFR § 182.10 - Spices and other natural seasonings and flavorings - US GRAS listing of sweet marjoram as Majorana hortensis Moench, separate from pot marjoram
- Draft Standard for Dried Sweet Marjoram (CX/SCH 25/8/7) - Codex product definition as dried Origanum majorana L., hygiene and contaminant hooks, powdered-form additives
- European Union herbal monograph on Origanum majorana L., herba - Traditional-use herbal drug: tea of comminuted herb; ethanolic extract in a cutaneous semi-solid
- What requirements must herbs and spices meet to be allowed on the European market? - EU pyrrolizidine-alkaloid limit of 1,000 μg/kg for marjoram; Codex CCSCH work on sweet marjoram
- Comparison of the Essential Oils of Origanum majorana L. and Origanum x majoricum Cambess. - Two Turkish chemotypes of O. majorana (carvacrol 'beyaz kekik' vs sabinyl mercanköşk); hybrid O. × majoricum
- Origanum majorana (Knotted Marjoram, Marjoram, Pot Marjoram, Sweet Marjoram) - Garden habit, confusion with O. vulgare, cold tenderness, reported toxicity to pets
What the second pass must settle
- Does vr.tr.marjoram denote only Origanum majorana, or also material called pot marjoram and other common-name variants, and does an existing world model already own any of this scope?
- Which botanical or laboratory authentication methods reliably distinguish the accepted marjoram scope from oregano and other substitutes in whole, dried and fragmented material?
- Which local growing thresholds and harvest practices are supported for the accepted taxa and cultivars, including cold exposure and recovery after cutting?
- Which validated drying, storage and sampling criteria should govern fresh and dried marjoram for each intended use?
- Which sensory references and preparation-specific evidence can support aroma grading and substitutions without assuming that all marjoram batches have equal strength?