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Dendrobium hercoglossum

Dendrobium hercoglossum

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Dendrobium hercoglossum, first described in 1886 by Reichenbach, derives its name from the Greek herkos (“fence”) and glossa (“tongue”), a reference to its distinctive divided lip. Native to Southeast Asia—including Myanmar, Thailand, Vietnam, Cambodia, Malaysia, Laos, southern China, and the Philippines—it typically inhabits evergreen and montane forests at elevations of 50 to 1,200 meters, often growing near streams.

Features:

  • This orchid is a medium-sized, sympodial epiphyte with clustered, slender, pendulous canes around 20–35 (up to 57) cm long. Leaves are linear-lanceolate, arranged distichously, and typically drop as the cane ages, with blooms appearing on both leafy and leafless sections.

  • Inflorescences arise from upper nodes and display 2–8 waxy, showy flowers measuring about 2.5–4 cm (1 inch) across. Sepals and petals show rosy pink to bright magenta hues, often with gradient coloration; the lip is pouch-like, pubescent, and white to greenish with magenta highlights. Flowers are typically fragrant, with a violet-like scent, and last around 2 weeks.

Care Tips:

Light

Thrives in bright, indirect light—similar to filtered forest canopy conditions. Avoid harsh midday sun to prevent leaf burn.

Temperature & Humidity

  • Temperature: Adaptable—grows well in cool to warm ranges:

    • Day: 20–30 °C (68–86 °F)

    • Night: can tolerate drops to around 9 °C (48 °F).

  • Humidity: Requires high humidity, commonly 60–80%, especially during warm growth periods.

Watering & Rest

  • Growing Season (spring–summer): Keep continually moist but allow slight drying between waterings. Use rainwater or distilled when possible.

  • Winter Rest: Reduce watering and stop fertilizing for 2–3 months to encourage blooming; resume regular care with new growth.

Potting & Mounting

  • Grows well mounted on cork or tree fern with frequent misting, or in well-draining mixes (bark, sphagnum, charcoal, perlite) in small hanging pots or baskets for good aeration.

Fertilization

During active growth, feed with a balanced orchid fertilizer every 1–2 weeks. Halt fertilizer during the rest period.

Pruning

After flowering, prune spent inflorescences and minimal-purpose pseudobulbs to encourage new shoots and maintain plant form.

Common Issues

Be vigilant against mealybugs, aphids, scale, and fungal issues from poor air circulation or overwatering. Maintain good airflow and adjust watering as needed.

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