Oncidium sphacelatum
This large epiphytic species is widely called the golden shower or popcorn orchid. It stands out for very tall, branching sprays that carry many small flowers. Best performance comes with bright filtered light, warmth, and regular moisture. North American growers keep it indoors or in greenhouses except in frost free zones. Blooming is most common from winter to spring. Flowers are mildly fragrant.
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)
containers, greenhouse, specimen
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
Written by: Your Flowers Guide editorial team
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