Green Iguana Care Sheet
AdvancedIguana iguana · lizard
Green iguanas are large, arboreal lizards requiring a very large enclosure, high humidity, and strong UVB lighting. They are advanced pets due to their size, specific diet, and potential for aggressive behavior.
Quick care stats
Adult size4-6 feet (1.2-1.8 m)
Lifespan15-20 years
Min enclosure6 ft x 3 ft x 6 ft (1.8 x 0.9 x 1.8 m) for an adult
Basking temp95-105°F (35-40°C)
Ambient temp80-85°F (27-29°C)
Night temp75-80°F (24-27°C)
Humidity60-80%
UVBYes - T5 HO 10.0 to 12% UVB, Ferguson zone 3-4
DietHerbivorous: 70% dark leafy greens (collard, mustard, dandelion), 20% vegetables (squash, bell pepper), 10% fruit (berries, mango) as treats. Feed daily for juveniles, every other day for adults.
HandlingCan be tamed with regular, gentle handling but may become aggressive during breeding season; not recommended for young children.
What you need (full setup)
🔧 T5 HO UVB fixture (10.0 or 12%)Essential for vitamin D3 synthesis and calcium metabolism; prevents MBD.🔧 Basking bulb (e.g., 100-150W halogen)Creates necessary basking spot temperature for thermoregulation.🔧 Ceramic heat emitter (CHE) or deep heat projectorProvides supplemental heat at night without light disruption.🔧 Thermostat (dimmer or proportional)Regulates heating devices to prevent overheating and ensure safe temperatures.🔧 Digital thermometer/hygrometer (with probes)Monitors temperature gradient and humidity levels accurately.🔧 Large water bowl (big enough to soak)Provides drinking water and helps maintain humidity; iguanas often soak.🔧 Substrate (coconut coir or cypress mulch, 2-4 inches deep)Retains humidity and allows burrowing; avoid sand or bark that can cause impaction.🔧 Sturdy climbing branches and platformsIguanas are arboreal; branches allow exercise and basking at different levels.
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Common health issues
- Metabolic bone disease (MBD)
- Respiratory infections
- Kidney disease / gout
- Parasites (internal and external)
⚠️ For any sign of illness (not eating, lethargy, swelling, retained shed), see a qualified exotics vet. Care sheets are general guidance only.