Brassia dayanum Plant Care
Otoglossum dayanum (Rchb.f.) Jenny & Garay
Updated · Sources · How we source care data
Otoglossum dayanum is known for its striking large, elongated leaves with prominent dark green veins running through them. This orchid species is native to the cloud forests of South America and is highly sought after by plant enthusiasts for its unique foliage.
Every 7–10 days
Bright indirect to filtered sunlight
65–75°F
60–80%
At a glance
How do you care for Brassia dayanum?
Water Brassia dayanum every 7–10 days, letting the top layer of soil dry out between waterings, and give it bright indirect to filtered sunlight. It prefers temperatures of 65–75°F (18–24°C) and 60–80% humidity. Fertilize it every 2 months during the growing season.
What Is the Brassia dayanum?
Brassia dayanum (Otoglossum dayanum) belongs to the Orchidaceae family within the Otoglossum genus. Brassia dayanum is native to South America. Brassia dayanum is also known as Odontoglossum grande.
Brassia dayanum displays an epiphytic, clumping orchid growth habit, reaching up to 2 ft tall with a spread of approximately 1 ft. Brassia dayanum produces showy, fragrant blooms in various colors.
Leaf size: approximately 8 inches.
How Often Should You Water a Brassia dayanum?
Otoglossum dayanum 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 Brassia dayanum Need?
Brassia dayanum thrives in bright indirect to filtered sunlight. Avoid placing Brassia dayanum in direct, harsh sunlight for extended periods, as this can scorch the foliage.
Light Requirement
Bright indirect to filtered sunlight
What Temperature and Humidity Does the Brassia dayanum Prefer?
Otoglossum dayanum grows best at temperatures of 65–75°F. Brassia dayanum prefers humidity levels of 60–80%. A pebble tray or humidifier helps maintain adequate moisture around the plant.
Temperature
65–75°F
Humidity
60–80%
What Soil Mix Works Best for a Brassia dayanum?
Loose, well-draining orchid mix with bark and perlite. Good drainage is essential for Brassia dayanum to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Brassia dayanum?
Feed Brassia dayanum every 2 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 2 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 Brassia dayanum?
Repot every 1-2 years after flowering. 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 Brassia dayanum?
Brassia dayanum can be propagated through division, back bulbs, keiki propagation. Similar propagation techniques also apply to none plant care, which shares the same genus.
Is the Brassia dayanum Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Brassia dayanum, so we can't confirm whether it is safe for cats and dogs. Keep pets from chewing it as a precaution.
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 Brassia dayanum?
Brassia dayanum is susceptible to aphids, scale insects, spider mites. 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 Brassia dayanum Need?
Brassia dayanum grows outdoors in USDA Zone 10b – 11b. It survives winters down to planting zone 10b. Brassia dayanum is native to South America. In cooler regions, grow Brassia dayanum as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 10b – 11b
Keep exploring plants
Brassia dayanum 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 Otoglossum genus — compare its care with other Otoglossum species on PlantoScan.
Otoglossum is part of the Orchidaceae plant family — browse all Orchidaceae genera and species.
Brassia dayanum thrives in bright light and direct sun — see other bright-light plants.
More Otoglossum Species
Other Otoglossum species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Otoglossum dayanum (Rchb.f.) Jenny & Garay, family Orchidaceae (first published in Orquideologia 27: 73 (2010)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Brassia dayanum, so we can't confirm whether it is safe for cats and dogs. Checked against the ASPCA plant list; any other toxicity note on this page comes from PlantoScan's plant database.
- Hardiness zone: USDA Zone 10b – 11b, estimated from the plant's typical growing conditions.
- 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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