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Marjoram · Origanum majorana · familia de las lamiáceas · USDA PLANTS: ORMA
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Las reglas y las notas de cosecha de esta página están traducidas automáticamente del inglés; sus fuentes, algunas notas y los títulos de las guías siguen en inglés.
Mejorana (Origanum majorana) es una planta perenne (familia de las lamiáceas).
También se conoce como Sweet Marjoram.
University of Maryland Extension, 'Growing Vegetables in Containers and Salad Tables', extension.umd.edu/resource/growing-vegetables-containers-and-salad-tables (fetched in-container 2026-09-25, read by the maintainer 2026-09-25): 'Small-statured herbs (basil, cilantro, thyme, mint, oregano, tarragon, and marjoram) will grow well in 2- to 5-gallon pots.' Stored is the minimum the sentence gives. [read]
These are estimates from general gardening knowledge, or the sources disagree on them, so treat them as a starting point rather than a firm figure.
Mecanismo: Nucleación de hielo en el tejido de la hoja.
Evidence: settled without a trial - climatology.
Siembra o trasplanta después de la fecha de la última helada, o empieza en interiores y trasplanta cuando haya pasado.
Mecanismo: Las zonas codifican la temperatura mínima invernal media anual, que determina si una perenne leñosa sobrevive hasta la primavera. Es la magnitud equivocada para una anual, que nunca llega a ver el invierno. Una zona demasiado cálida es un segundo mecanismo, distinto. Los inviernos suaves no matan a una perenne; no le dan el frío que necesita. Los frutales caducifolios necesitan un periodo de latencia invernal para brotar y dar fruto, así que en una zona más suave que aquella a la que está adaptada una planta, esta puede sobrevivir y nunca producir. Solo se aplica el extremo frío, porque solo la supervivencia invernal se deduce de lo que mide una zona; el extremo cálido es un consejo, no un rechazo. Ese límite cálido pertenece a la variedad, no a la especie, y ese es el límite honesto de lo que esta regla puede hacer. El requisito de frío se publica por variedad y varía muchísimo dentro de una especie, así que un techo a nivel de especie dice "el rango modelado no llega a tu zona", nunca "ninguna planta de este tipo te dará cosecha". Por eso, por encima de su rango, el planificador sigue ofreciendo la planta, con el consejo de elegir una variedad clasificada para tu zona, en lugar de rechazarla.
Evidence: confirmed against 3 sources in the research-based literature.
THE FLOOR IS TRUE BY DEFINITION and needs no citation: the USDA system defines a zone AS a band of average annual minimum winter temperature, so 'a plant colder-hardy than your zone survives your winter' is the definition restated. This rule was `verified_trivially` on that basis alone until 2026-07-26. THE CEILING WAS NEVER COVERED BY IT - a minimum-temperature definition says nothing about a plant failing for want of chill - and that gap is why ISSUES #13 exists. The pointer below closes it.
OSU Extension EC 1303, 'Growing blackberries in your home garden' (Bernadine Strik), catalog.extension.oregonstate.edu/sites/catalog/files/project/pdf/ec1303.pdf (read 2026-07-26). THE CEILING'S MECHANISM, STATED: 'Winter cold-hardy cultivars adapted to the colder regions of Oregon (such as zones 5 to 7), may not grow normally in regions of the Willamette Valley (zone 8) where winters are warmer and plants receive less winter chill.' A plant failing in a WARMER zone for want of chill - which is what this rule's upper bound enforces and what no source said until now. THE SAME PAGE MAKES IT A CULTIVAR PROPERTY: 'Even cultivars within the same type (trailing, erect or semierect) differ in fruit quality and flavor, appearance, tolerance to pests, cold hardiness, and plant longevity', and the remedy it gives is the one this rule's rejection text now repeats: 'Minimize risk by choosing types and cultivars that are adapted to your hardiness zone.' The page then publishes a table of sixteen cultivars EACH WITH ITS OWN ZONE RANGE, which is the strongest available evidence that a species-level band is an approximation. [read]
WHAT THIS DOES NOT SETTLE (amended 2026-09-24). The mechanism is named, but the corpus carries ONE band per species where the source carries one per cultivar, so the warm limit is explained without being precise. That is why, since 2026-07-26, the planner treats the warm end as advice rather than a refusal: above a species' band it still offers the plant and says to look for a cultivar rated for your zone, never that nothing will crop. Every species band now records what its sources say, though most are still marked estimated.
Mecanismo: Un cultivo sensible a las heladas con muchos días a la cosecha no puede madurar si solo se siembra directamente después de la última helada — la ventana sin heladas es demasiado corta. Una ventaja inicial bajo cubierta compra las semanas que le faltan a la temporada; la plántula solo se trasplanta una vez que ha pasado la helada — la fecha de trasplante sigue dependiendo de la helada.
Evidence: confirmed against 2 sources in the research-based literature.
University of Minnesota Extension, 'Starting seeds indoors', extension.umn.edu/planting-and-growing-guides/starting-seeds-indoors: seed-starting chart gives tomato '5-6 weeks' and pepper and eggplant '9 weeks' before the outdoor planting date (warm crops set out after the last frost). Read 2026-07-19 (LLM-summarised); read by the maintainer 2026-07-25, which is the read that promoted this rule. Note what the corpus's per-crop values do with the sources: tomato 6 sits at the top of Minnesota's '5-6 weeks' and inside Illinois's '6-8'; pepper and eggplant 8 sit BELOW Minnesota's '9 weeks' and at the top of Illinois's '6-8'. They are a reconciliation of two published ranges, not a figure either source prints.
University of Illinois Extension, 'When should I start my seeds?' (2023-02-10), extension.illinois.edu/blogs/good-growing/2023-02-10-when-should-i-start-my-seeds: peppers, tomatoes, and eggplant started '6-8 weeks before the last frost'. Read 2026-07-19.
Otras 120 reglas dependen de tu huerto y no de la planta — rotación de cultivos, fechas de helada, sol, distancia entre plantas y suelo. Velas todas.
Milpa Gardens. "Mejorana (Origanum majorana)." https://milpa.garden/es/plants/origanum-majorana/
A garden-planning corpus: every claim states its evidence grade and links its sources on the page. Cite it with the grade, and add the date you read it.