Giant day gecko (Phelsuma grandis)
Photo: Charles J. Sharp / CC BY-SA 4.0 · via Wikimedia Commons

Reptile · Gecko

Giant day gecko care guide

Phelsuma grandis

IntermediateCITES – buy captive-bred

The giant day gecko is a intermediate-level gecko from Northern Madagascar. Adults reach 25–30 cm and live 15–20 years in captivity. Solitary. Needs UVB.

  • Enclosure 45 × 45 × 60 cm
  • Temp 26–30°C, basking 32°C
  • Humidity 50–70%

How much does a giant day gecko cost in Canada?

Animal$100–300Typical captive-bred price
Bioactive enclosure$580–1050Enclosure $190–370 · equipment $210–450 · bioactive supplies ≈ $200
Yearly upkeep$300–450Food, supplements, bulbs, power, vet fund
First year total$980–1800All prices CAD, estimates

Giant day gecko quick facts

Skill level
Intermediate
Adult size
25–30 cm
Lifespan
15–20 years
Activity
Diurnal
Native range
Northern Madagascar
Minimum enclosure
45 × 45 × 60 cm (18 × 18 × 24 in, ≈ 32 US gal)
Housing
Best kept alone.
Temperature
26–30°C, basking 32°C
Humidity
50–70%
UVB
Required
Diet
Omnivore – crickets, roaches, fruit gecko diet
Bioactive style
Tropical arboreal

Giant day gecko enclosure & bioactive setup

Give one adult at least 45 × 45 × 60 cm (18 × 18 × 24 inches). Best kept alone. This species suits a tropical arboreal bioactive build.

  1. Leaf litter2 cm
  2. Jurassic ABG Terrarium Mix8 cm
  3. Drainage – clay bio balls4 cm

Most of the action is vertical – keep the soil moist but not wet, and focus on perches and dense planting.

Temperature: 26–30°C, basking 32°C. Humidity: 50–70%. UVB: Required.

What does a giant day gecko eat?

Omnivore – crickets, roaches, fruit gecko diet. Insects every 2–3 days plus fruit or gecko diet twice weekly.

Handling, temperament & health

Display animal; skin tears easily, so avoid handling.

Health watch: Torn skin from handling, metabolic bone disease without UVB, dehydration.

Cleaning & maintenance schedule

Daily

  • Mist to raise humidity – usually a heavy evening misting with a dry-down by day.
  • Check temperatures at perch height.

Weekly

  • Feed; remove uneaten food (and diet dishes after 24–48 h).
  • Check the drainage layer and prune vines.
  • Look for stuck shed on toes and tails.

Monthly

  • Top up leaf litter.
  • Check branches and mounts are still secure.
  • Clean glass, vents and misting nozzles.

Yearly

  • Refresh the top of the soil in open areas.
  • Replace UVB bulbs (if used) on schedule.

Recommended for a giant day gecko bioactive

Quantities are for one minimum-size enclosure (45 × 45 × 60 cm).

Giant day gecko FAQ

Is the giant day gecko good for beginners?

The giant day gecko is best for keepers with some experience (intermediate). Display animal; skin tears easily, so avoid handling.

What size enclosure does a giant day gecko need?

At least 45 × 45 × 60 cm (about 18 × 18 × 24 inches, roughly 32 US gallons) for one adult. Best kept alone.

How much does a giant day gecko cost in Canada?

Typically $100–300 CAD to buy, about $580–1050 CAD for a complete bioactive enclosure, and $300–450 CAD a year to keep.

What temperature and humidity does a giant day gecko need?

Temperature: 26–30°C, basking 32°C. Humidity: 50–70%.

What does a giant day gecko eat?

Omnivore – crickets, roaches, fruit gecko diet. Insects every 2–3 days plus fruit or gecko diet twice weekly.

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This care sheet is general guidance from One Bioactive, not veterinary advice. Needs vary with age, locality and individual animals – confirm with your breeder and an exotics vet. Prices are typical Canadian ranges in CAD and change over time.