North America Native Plant

Royal Star Orchid

Botanical name: Encyclia isochila

USDA symbol: ENIS

Life cycle: perennial

Habit: forb

Native status: Native to Puerto Rico  

Synonyms: Epidendrum belvederense Fawc. & Rendle (EPBE2)  âš˜  Epidendrum isochilum Rchb. f. var. tridens (EPIST)   

Royal Star Orchid: Puerto Rico’s Fragrant Native Beauty If you’re dreaming of adding a touch of tropical elegance to your garden, meet the royal star orchid (Encyclia isochila) – a stunning native orchid that calls Puerto Rico home. This perennial beauty isn’t just another pretty face in the orchid world; ...

Royal Star Orchid: Puerto Rico’s Fragrant Native Beauty

If you’re dreaming of adding a touch of tropical elegance to your garden, meet the royal star orchid (Encyclia isochila) – a stunning native orchid that calls Puerto Rico home. This perennial beauty isn’t just another pretty face in the orchid world; it’s a fragrant, star-shaped wonder that brings both visual appeal and sweet scents to specialized garden spaces.

What Makes the Royal Star Orchid Special

The royal star orchid earns its regal name through its distinctive star-shaped blooms that appear in delightful clusters. These fragrant flowers typically showcase creamy white petals adorned with striking purple or magenta markings on the lip, creating a color combination that’s both elegant and eye-catching. As a native species to Puerto Rico, this orchid has evolved perfectly for tropical conditions and plays an important role in the local ecosystem.

Botanically known as Encyclia isochila, this epiphytic orchid grows as what botanists call a forb – essentially a non-woody perennial plant. You might also encounter it under its scientific synonyms, including Epidendrum belvederense.

Where Does It Grow Naturally

This charming orchid is endemic to Puerto Rico, where it thrives in both montane forests and coastal areas. Its natural habitat gives us important clues about how to successfully grow it in cultivation.

Why Garden with Royal Star Orchid

There are several compelling reasons to consider adding this native beauty to your plant collection:

  • Fragrant blooms: The sweet scent adds another sensory dimension to your garden experience
  • Native species support: Growing native plants helps preserve local biodiversity
  • Pollinator magnet: Attracts native moths and small bees, supporting local ecosystems
  • Unique aesthetic: Star-shaped flowers provide an distinctive architectural element
  • Conversation starter: A relatively uncommon orchid that’s sure to impress visitors

Growing Conditions and Care

Successfully growing royal star orchid requires replicating its natural tropical environment. This isn’t a plant for beginners, but with the right setup, it can be incredibly rewarding.

Climate Requirements: This orchid thrives only in USDA hardiness zones 10-12, making it suitable for tropical and subtropical regions or greenhouse cultivation in cooler areas.

Light and Humidity: Provide bright, filtered light – think dappled sunlight through trees. Maintain humidity levels between 60-80% with excellent air circulation to prevent fungal issues.

Growing Medium: As an epiphytic orchid, it doesn’t grow in regular soil. Instead, mount it on cork bark or plant it in a specialized orchid bark mix that drains quickly.

Planting and Care Tips

Here’s how to keep your royal star orchid happy and blooming:

  • Watering: Water regularly but allow the growing medium to dry out between waterings – soggy roots are this orchid’s enemy
  • Fertilizing: Feed monthly during the growing season with a diluted orchid fertilizer
  • Air circulation: Ensure good airflow around the plant to prevent moisture-related problems
  • Temperature: Maintain warm temperatures year-round, ideally between 70-85°F during the day
  • Mounting: If mounting on bark, secure gently but firmly and mist regularly until established

Garden Design Ideas

The royal star orchid shines brightest in specialized settings:

  • Orchid gardens: Perfect as a specimen plant in dedicated orchid collections
  • Tropical landscapes: Mount on trees or structures in tropical garden designs
  • Greenhouse collections: Ideal for controlled environment growing
  • Epiphyte gardens: Combine with other air plants and epiphytic species

Is This Orchid Right for You

The royal star orchid is best suited for experienced tropical gardeners or orchid enthusiasts who can provide the specialized care it needs. If you live in Puerto Rico or other tropical areas within zones 10-12, and you’re passionate about supporting native species, this could be a wonderful addition to your collection.

However, if you’re new to orchid growing or live in a temperate climate without greenhouse facilities, you might want to start with more forgiving orchid species before tackling this beautiful but demanding native.

Remember, when sourcing your royal star orchid, always purchase from reputable dealers who sell responsibly propagated plants to help protect wild populations of this Puerto Rican native.

Royal Star Orchid

Classification

Group

Monocot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Liliopsida - Monocotyledons

Subclass

Liliidae

Order

Orchidales

Family

Orchidaceae Juss. - Orchid family

Genus

Encyclia Hook. - butterfly orchid

Species

Encyclia isochila (Rchb. f.) D. Dod - royal star orchid

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA