Giant Orchid (Grammatophyllum speciosum)

Giant Orchid

Grammatophyllum speciosum

It blooms in towering clusters like a tropical crown, the world's largest orchid species. Evergreen epiphytic orchid; common names: giant orchid, tiger orchid.

Partial sun
1–2/week
Moderate
🌱

Plant Needs

☀️
Sunlight Bright indirect light; tolerate partial shade; avoid harsh midday sun to prevent leaf scorch
💧
Watering Water thoroughly when pseudobulbs start to wrinkle; avoid overwatering to prevent root and pseudobulb rot
🌡️
Temperature Warm tropical temperatures; maintain 18–32°C for optimal growth; protect from drafts below 15°C
🔍

Characteristics

  • Leaf: Long, leathery, strap-shaped leaves up to 1.5 m; dark green with parallel venation
  • Flower: Dense racemes up to 2 m long; yellow blooms with brown/red tiger-like stripes
  • Stem: Thick, fleshy pseudobulbs store water and nutrients for drought tolerance
🛠️

Care Guide

Watering

Keep growing medium slightly moist; mist pseudobulbs to boost ambient humidity

Fertilization

Diluted orchid-specific feed every 2 weeks. Cease fertilization in autumn and winter during dormant periods

Banana peel tea:Soak fully composted banana peels in water for 3 days; dilute 1:20 for root drench; avoid raw peels to prevent odor and pest infestations
Pruning
  • Remove spent flower spikes after blooming to redirect energy to pseudobulb growth
  • Trim dead or yellowing leaves to maintain airflow and reduce disease risk
  • Divide overcrowded pseudobulb clumps in spring when repotting to promote healthy growth
⚠️

Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: Non-toxic to cats per ASPCA guidelines

Humans: No documented toxicity to humans per ASPCA and horticultural sources

📖

Garden Uses & Culture

Culture: Symbolizes tropical abundance and resilience; highly prized in professional orchid collections

Usage: Ornamental specimen plant; greenhouse display; tropical garden accent