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Oncidium sphacelatum
Oncidium species (Oncidiinae)
At‑a‑glance
- Group/Class: Oncidium species (Oncidiinae)
- Height × spread: 2 to 6 ft tall including spike (0.6 to 1.8 m); 1.5 to 2 ft wide (45 to 60 cm)
- Bloom window: winter to spring; varies by climate
- Color & flower form: many small yellow flowers with brown markings on branched panicles
- Fragrance: 1 trace
- USDA hardiness: 10b to 12b; grown as a houseplant elsewhere
- Breeder / Year / Origin: unknown, 1841, Mexico to Central America
- Pet safety: safe
How it differs
- Taller inflorescences than a typical Oncidium.
- Mild scent rather than strong perfume.
- Needs extra space for arching sprays.
Strengths
- Spectacular display on mature plants.
- Handles bright light when acclimated.
- Adaptable to baskets and mounts.
Care in one minute
Site: bright indirect light near a south or east window with gentle shade.
Medium: airy bark based mix; slightly acidic; excellent drainage.
Water: soak and drain; water again when the top inch is nearly dry.
Feed: quarter strength orchid fertilizer every 2 to 4 weeks in growth; flush monthly.
Watch‑outs
- Not frost tolerant in most of North America.
- Heavy spikes may need staking.
- Roots decline in soggy, compact media.
Best uses (tags)
Provenance note
Described by John Lindley in 1841. Native from Mexico into Central America
References
- Kew – Plants of the World Online, Oncidium sphacelatum
- NC State Extension – Oncidium sphacelatum profile
- American Orchid Society – Oncidium culture sheet
- ASPCA – Golden Shower Orchid non-toxic listing
