advancedrareGrammatophyllum
Giant Orchid
Grammatophyllum speciosum
Largest orchid in the world; massive sprays of yellow-spotted flowers.
Bloomsyellowbrown
Sign in to addWaterhigh
Heavy water in growth
Lighthigh
Very bright
Foodhigh
Heavy feeding
Temp
65-95°F
Humidity
60-80%
Origin
SE Asia
Special care:Enormous; needs space and years to bloom
About Giant Orchid
Researching Giant Orchid…
Care guide
Potting medium
Open, fast-draining orchid bark mix in a pot with drainage holes.
Repotting
Every 2 years or when the medium breaks down.
Bloom season
Varies by species and growing conditions.
Bloom longevity
Typically 3–6 weeks per spike.
Growth habit
Refer to the species' parent genus for growth pattern.
Propagation
Division at repotting time, ideally just as new growth begins.
Pests & prevention
Watch for scale, mealybugs, and spider mites — wipe with diluted isopropyl alcohol.
Signs of trouble
- ●Mushy roots → reduce watering and repot in fresh dry medium
- ●Yellowing leaves → check light levels and watering frequency
Grower's tips
- ★Consistency matters more than perfection — pick a routine and stick with it.
- ★Air movement prevents most fungal and bacterial issues.