Description
🛠️ Handling and Repotting
Due to their size, Grammatophyllum orchids need careful handling:
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Container Choice: Use very large, sturdy pots or wooden baskets
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Mounting Option: Can also be mounted on large trees or slabs for natural growth
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Repotting Frequency: Every 3–4 years or when the plant has outgrown the container
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Medium: Coarse orchid mix (bark, charcoal, coconut husk, perlite); excellent drainage is essential
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Handling Tip: Be gentle with roots and pseudobulbs; their large size makes them prone to breakage during transport
🌱 Care Guide
☀️ Light:
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Bright, indirect light (50–70% shade)
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Can tolerate some direct morning sun
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Avoid harsh midday sun which can scorch the leaves
💧 Water:
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Water thoroughly when the medium is almost dry
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During growing season (spring to summer): keep slightly moist
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Reduce watering in winter
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Ensure excellent drainage; avoid soggy conditions
💨 Humidity:
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Prefers 50–70% humidity
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Increase humidity with trays or misting in dry environments
🌡️ Temperature:
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Day: 25–32°C (77–90°F)
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Night: 18–22°C (64–72°F)
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Can tolerate warm climates but protect from frost
🌸 Feeding:
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Use balanced orchid fertilizer (20-20-20) every 2–3 weeks during active growth
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Dilute fertilizer to half-strength
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Reduce feeding during dormant months
✂️ Pruning:
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Remove spent flower spikes once they brown and dry
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Trim dead or damaged leaves and pseudobulbs
⚠️ Common Issues
Problem | Cause | Solution |
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Leaf yellowing | Overwatering or poor drainage | Improve airflow, reduce watering |
No flowers | Low light or poor nutrition | Increase light, use bloom booster |
Root rot | Soggy medium | Repot in fresh, dry mix |
Pests (scale, mealybugs) | Insects feeding on sap | Use neem oil or insecticidal soap |
📌 Tips:
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Grammatophyllum orchids are not for beginners—they require space, patience, and care.
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Ideal for outdoor growing in tropical climates or greenhouses.
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When mature, they can become showstoppers at orchid shows or gardens.
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