Photo: Daniel CahenCC BY 4.0via iNaturalistresized / cropped
Sweet Marjoram Plant Care
Origanum majorana L.
Updated · Sources · How we source care data
Marjoram is a cold-sensitive perennial herb or undershrub with sweet pine and citrus flavours. In some Middle Eastern countries, marjoram is synonymous with oregano, and there the names sweet marjoram and knotted marjoram are used to distinguish it from other plants of the genus Origanum.
Every 7–10 days
Full sun to partial shade
50–80°F
40–60%
At a glance
How do you care for Sweet Marjoram?
Water Sweet Marjoram every 7–10 days, letting the top layer of soil dry out between waterings, and give it full sun to partial shade. It prefers temperatures of 50–80°F (10–27°C) and 40–60% humidity. Fertilize it every 6 months during the growing season. The ASPCA lists it as toxic to cats and dogs, so keep it out of reach of pets.
What Is the Sweet Marjoram?
Sweet Marjoram (Origanum majorana) belongs to the Lamiaceae family within the Origanum genus. Sweet Marjoram is also known as Marjoram, Pot Marjoram.
Sweet Marjoram displays a low-growing, spreading herb growth habit, reaching up to 0.5 ft tall with a spread of approximately 1 ft. Sweet Marjoram produces small clusters of pink, purple, or white flowers.
Leaf size: approximately 1 inches.
How Often Should You Water a Sweet Marjoram?
Origanum majorana requires watering every 7–10 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.
Watering Frequency
Every 7–10 days
Let soil partially dry between waterings
What Light Does the Sweet Marjoram Need?
Sweet Marjoram thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Sweet Marjoram Prefer?
Origanum majorana grows best at temperatures of 50–80°F. Sweet Marjoram prefers humidity levels of 40–60%.
Temperature
50–80°F
Humidity
40–60%
What Soil Mix Works Best for a Sweet Marjoram?
Well-draining sandy loam with added compost for nutrients. Good drainage is essential for Sweet Marjoram to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Sweet Marjoram?
Feed Sweet Marjoram every 6 months during the growing season (spring and summer) with a balanced fertilizer diluted to the strength on the label.
Pause feeding in autumn and winter, when growth slows, and never fertilize dry soil — water first.
Fertilizing
Every 6 months
During the growing season
The PlantoScan app can remind you when to water and when to fertilize each plant.
How Do You Repot a Sweet Marjoram?
Repot every 1-2 years in early spring. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.
How Do You Propagate a Sweet Marjoram?
Sweet Marjoram can be propagated through seeds, stem cuttings. Similar propagation techniques also apply to oregano plant plant care, which shares the same genus.
Is the Sweet Marjoram Toxic to Pets and Children?
Toxic to cats and dogs
Source: ASPCA Animal Poison Control Center plant list. View the ASPCA entry
This is a general caution, not veterinary or medical advice. If your pet ate a plant, contact your vet or animal poison control.
See all plants toxic to cats and plants toxic to dogs.
What Pests and Diseases Affect the Sweet Marjoram?
Sweet Marjoram is susceptible to aphids, spider mites, thrips. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.
Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.
What USDA Hardiness Zone Does the Sweet Marjoram Need?
Sweet Marjoram grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. In cooler regions, grow Sweet Marjoram as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 12a
Keep exploring plants
Sweet Marjoram is one of many species covered in the complete plant care and identification guide, which groups plants by genus, attribute, and popularity.
It belongs to the Origanum genus — compare its care with other Origanum species on PlantoScan.
Origanum is part of the Lamiaceae plant family — browse all Lamiaceae genera and species.
Sweet Marjoram thrives in bright light and direct sun — see other bright-light plants.
Related Plant Care Guides
Closely related plants with similar care requirements:
Sources
- Scientific name & taxonomy: Origanum majorana L., family Lamiaceae (first published in Sp. Pl. : 590 (1753)) — World Flora Online record, IPNI name record, Wikidata.
- Pet toxicity: The ASPCA lists Sweet Marjoram as toxic to cats and dogs. Source: ASPCA Toxic and Non-Toxic Plant List.
- Photo: Daniel Cahen, CC BY 4.0, iNaturalist — original.
- Hardiness zone: USDA Zone 12a, calculated from the plant's minimum temperature.
- Care values(watering, light, temperature, humidity, soil, fertilizing): PlantoScan's plant database, filtered by automatic plausibility checks — values that fail them are hidden. How we source and check plant data.
Spotted a mistake? Email info@upvision.media with the page link — we check and correct reported errors.
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