Why Plants Die
Theme
Theme

Curled Odontoglossum

Oncidium alexandrae, Orchidaceae

Sources last read 14 September 2026.

Not yet rated How forgiving it is has not been judged here yet.

Also called Lace Orchid.

Curled Odontoglossum (Oncidium alexandrae), the whole plant.
Motohiro Sunouchi, CC BY 4.0 · Wikimedia Commons

Toxicity is partly unassessed

  • Not assessed for cats. This plant is not on the ASPCA list. That is not a finding of safety: none of the sources read for this site gives an answer either way. Treat it as unknown.
  • Not assessed for dogs. This plant is not on the ASPCA list. That is not a finding of safety: none of the sources read for this site gives an answer either way. Treat it as unknown.
  • Not assessed for people. NC State Extension publishes no harm statement for this plant. That is not a finding of safety: none of the sources read for this site gives an answer either way. Treat it as unknown.

What the sources say about its care

Light
Deep shade, Partial Shade
NC State Extension · read 13 September 2026
Water
Good Drainage, Moist
NC State Extension · read 13 September 2026
Humidity

No source read publishes a humidity figure for any plant on this site. What follows is general guidance for foliage plants.

ASHRAE recommends indoor relative humidity between 30% and 60% 30–60%
Penn State Extension · read 13 September 2026
Toxic to cats
Not on the ASPCA list. That is not a finding of safety.
ASPCA · read 13 September 2026
Toxic to dogs
Not on the ASPCA list. That is not a finding of safety.
ASPCA · read 13 September 2026
Harmful to people
No record of poisoning in people is listed for this plant; that absence is not evidence it is safe.
NC State Extension · read 13 September 2026

Routine care

Watering
It needs medium to heavy shade, cool, humid conditions and plenty of water.
NC State Extension · read 13 September 2026

Move something and watch

Loading the simulator. It needs JavaScript; the care table above does not.

Flowers of Curled Odontoglossum (Oncidium alexandrae).
FlowersMotohiro Sunouchi, CC BY 4.0 · Wikimedia Commons

About the plant

Oncidium alexandrae, synonyms including Odontoglossum crispum, is an epiphytic orchid in the genus Oncidium. Known as the curled odontoglossum, it is considered by many to be the most beautiful orchid of all but is also one of the most difficult to grow.

From Wikipedia, CC BY-SA 4.0 · read 13 September 2026

Native range
Colombia
World Checklist of Vascular Plants, June 2026 release, CC BY.
Kew WCVP · read 13 September 2026
Colombia
NC State Extension · read 13 September 2026
Climate
wet tropical
World Checklist of Vascular Plants, June 2026 release, CC BY.
Kew WCVP · read 13 September 2026
Growth form
pseudobulbous epiphyte
World Checklist of Vascular Plants, June 2026 release, CC BY.
Kew WCVP · read 13 September 2026
Epiphyte; habit arching, erect
NC State Extension · read 13 September 2026
Flowering
Flowers gold/yellow, pink, white; blooms in winter
NC State Extension · read 13 September 2026

More of the Orchidaceae family

Plants with similar care

Sources

What this does not cover

The figures above are what published sources say, not measurements of the plant in your room. They say nothing about your pot size, your water, the season, or how far from the glass the plant stands, and those decide more than any figure here does.

Humidity has no species figure because no source read for this site publishes one, and the only temperature published for this plant is a cold floor. The simulator fills those gaps with general figures for its kind of plant, marked as general and listed on how we read sources. Where a toxicity row says the plant was not assessed, that is the absence of a finding and not a finding of safety.

If something is already wrong, the diagnosis tool asks about the soil, the window and the watering, which is where the answer usually is.