Use this guide as a starting point alongside the detailed sources below. Health concerns, unexplained changes in behavior, or feeding problems belong with a veterinarian experienced with arachnids.
Adult enclosure recommendation
Our recommended minimum: 18″ × 18″ × 1′ (45.8 × 45.8 × 30.5 cm), length × depth × height.
Usable internal space for 1 adult animal. One adult Grammostola rosea; both sexes; minimum is scoped to the adult size description in this guide, not related species or breeding groups. Plan for a large female approaching 6″ (15 cm) diagonal leg span; males are typically smaller. Smithsonian gives a smaller usual adult figure, while the Chilean official species account gives a maximum female spread around 5½–6″ (14–15 cm).
Height is the usable internal envelope, including the space reserved for substrate and water. Check the remaining movement space and lamp clearance after installation.
A larger footprint can add useful retreat and drinking choices. Keep the same substrate, climbing or low-fall requirements, ventilation and safe access.
Creature Corner editorial allocation of usable floor, retreat, substrate and clearance informed by the cited ecology and husbandry practice. Exact dimensions are not experimentally validated welfare limits. The article explains the conditions and limits behind this recommendation.
- Floor space
- 18″ × 18″ (45.8 × 45.8 cm) internal floor; retain accessible routes after the retreat and water provision are installed.
- Climbing space
- Low stable retreats and ground routes; do not add exposed height or a hard fall path. Secure heavy supports independently of burrowable soil.
- Substrate
- Reserve 8″ (about 20.3 cm) of substrate and 4″ (10.2 cm) of space above it before furnishings. These are internal dimensions; the stated height already includes the substrate.
- Water
- Clean shallow drinking water continuously available; stable vessel, easy exit, inspected daily and after contamination.
- Security and ventilation
- One animal. Latch or clip the lid securely, keep gaps too small for escape and retain effective ventilation. Plan safe service access and transfers with a catch cup and a large empty catch tub in a closed room. Check the furnished enclosure against the retreat, water and safety requirements as well as its dimensions.
Meeting these dimensions alone does not establish suitability. Check the usable layout, environmental conditions, equipment clearance and the individual animal’s requirements before occupation.
Understand the name before making a decades-long plan
The Chilean rose tarantula is Grammostola rosea. Current catalog taxonomy treats Grammostola porteri as its synonym, so older gray-form or rose-hair labels do not justify a second species guide. Preserve a seller’s old name in your records and ask about provenance, but do not identify a spider solely from whether its hairs look red or gray.
Care is built around a solitary ground spider with a protected retreat, accessible drinking water and insect meals that may be widely spaced. Periods with little visible activity can occur. Keeping a record lets you distinguish an otherwise stable fast from gradual deterioration, rather than repeatedly disturbing the retreat to make the spider perform.
Allow for a large female approaching 6″ (15 cm) diagonal leg span, the spread of the legs. Usual sizes reported by Smithsonian are smaller; a Chilean government species account gives a similar maximum female spread. Smithsonian reports females can reach around 20 years in human care, with shorter-lived males; a keeper estimate puts males near five years from hatching. These are not reliable survival averages or a remaining-life prediction for an adult of unknown age.
Use an explicit low enclosure with substantial soil
For one adult up to that leg span, our recommended minimum is 18″ × 18″ × 1′ (45.8 × 45.8 × 30.5 cm) of usable internal length × depth × height. Allocate 8″ (about 20.3 cm) to substrate and 4″ (10.2 cm) above it before furnishings. The exact dimensions combine floor access, a modifiable retreat and short exposed falls; they are an editorial recommendation, not an experimentally established welfare threshold.
A larger floor can add useful retreat and drinking choices. We do not prescribe a second numerical target as a proven optimum. Maintain the soil and low exposed clearance when expanding: an empty tall aquarium does not become better terrestrial housing simply because its advertised volume increases.
Fit a securely latched or clipped lid and check vents, corners and cable gaps against the current animal’s size. Use the final soil level when testing reach to the lid. Preserve ground routes around the shelter and dish, and avoid tall hard ornaments beneath climbing routes.
Offer a dry surface and a shelter that can be altered
Field context includes woodland and scrub with tough, drought-resistant leaves (sclerophyll vegetation), so the animal should not be reduced to one exposed-desert temperature and humidity label. Provide clean soil and coconut fiber (coir) or another suitable fine medium without fertilizer, pesticides or aromatic wood shavings. Lightly pack it so a started depression and low cork shelter remain stable.
Keep most upper ground dry and retain a localized lightly damp lower corner if needed as the enclosure dries. Do not make the entire floor perpetually wet or allow its drinking dish to remain empty because the species is described as arid. Observe the actual lower moisture and surface condition rather than working from a fixed misting calendar.
Support heavy items independently of excavatable soil. A spider can undermine a pile of decorative stone even if it initially seems solid. Leave functional silk, moved soil and blocked entrances intact during ordinary cleaning. A retreat is a resource the spider can modify, not just a decoration for it to sit beneath.
Choose a moderate air-temperature plan and check it
Use air temperatures around 70–74°F (21–23°C) for ordinary maintenance. This modest band falls inside the species keeper reference and is our working choice, not a clinical tolerance limit. Check air at the retreat entrance and opposite ground route through day and night; a heater’s dial or an infrared surface reading is not an air measurement.
If environmental control is needed, consider room warming or a suitable thermostatically controlled source that preserves a cooler refuge. Verify the result independently. Avoid heating the full floor underneath the burrow, uncontrolled lamps and direct sunlight. No winter dormancy or seasonal drying treatment is prescribed merely because the source region has seasons.
Give the enclosure visible daytime light, full retreat shade and darkness at night. A 12-hour day/12-hour night is a convenient starting routine. No ultraviolet B (UVB) target or dedicated UVB lamp is prescribed by this guide; a species requirement and safe dose were not established. Ordinary insect feeding does not acquire a reptile supplement schedule from the lamp choice.
Keep a water dish usable throughout a fast
Provide continuous clean drinking water in a shallow stable dish with easy exit. Inspect and refresh it daily and after contamination. If the spider buries it, correct its position without opening an occupied burrow. Do not use a sponge instead of an accessible water surface.
A single relative-humidity percentage does not tell you whether the soil is flooded or the animal can drink. We use upper drying, lower moisture choice, ventilation and the water dish as the practical checks. A hygrometer is useful for trends only when its position and temperature are recorded. Persistent condensation or sour wet material needs correction rather than more spraying.
Offer food with records and tolerate a stable refusal
Use well-maintained captive-reared crickets, roaches or other suitable insects. As a conservative size check, begin with prey no longer than the tarantula’s abdomen and offer one item at a time. Remove uneaten food and remains. There is no ordinary need for vertebrate meals or raw meat. For a tiny spiderling, use pinhead crickets, tiny roach nymphs or a small pre-killed insect placed within reach of the retreat.
Start adult meal reviews every two to three weeks, juvenile reviews every seven to ten days and small spiderlings with small offers about twice weekly. Adjust portions and intervals to actual prey size, abdomen condition, maturity and response. These species keeper starting points differ from more frequent generic veterinary schedules; combining them into a large fixed ration would obscure the individual animal.
Extended fasting can occur, but no calendar length guarantees that a fast is harmless. Continue water and environment checks while observing condition. A stable adult refusing food is different from one progressively shrinking or losing coordination. Do not force-feed, repeatedly dig the animal out or add insects to wait for appetite to return. No routine calcium/multivitamin dusting is prescribed; nutritional problems require an individual assessment. Remove any uneaten prey and food remains within 24 hours; remove them sooner if the spider refuses, retreats to molt or appears vulnerable.
Protect the spider when eating and movement change
Premolt can involve reduced appetite, a darker abdominal area or a closed retreat. Remove live prey, keep the water provision and environment stable, and avoid probing the animal. Lying on the back can be a normal shedding position; do not turn the tarantula upright or touch it to test whether it is alive.
After shedding, wait for normal coordinated movement and hardened mouthparts before feeding. If the fangs are visible without disturbing the spider, they should be dark again rather than pale or reddish. Do not handle it or open its retreat to check; wait if readiness is uncertain. Larger animals may take well beyond a few days. A date is not a substitute for readiness, and a refused first meal should be removed. Never pull retained cuticle or apply a home bath, oil or medication. A deteriorating incomplete molt needs qualified veterinary assessment.
Plan young and mature care separately
A tiny spiderling needs smaller prey, finer escape protection and closer attention to drying and drinking access. Use a raising container that still permits shelter, usable soil and airflow, and enlarge it as the animal grows. Temporary small housing is not the adult recommendation. A mature male’s wandering and reduced appetite should be interpreted with sex, stage and condition records rather than automatically triggering more food.
Keep one animal. Relatedness, a calm reputation and the possibility of long fasting do not make cohabitation safe. Pairing or a female with eggs/young requires a separate species-qualified plan; routine maintenance does not need a mate, forced cooling or egg-sac extraction.
Prepare access that leaves the retreat undisturbed
Use long tools and a catch cup for a necessary transfer, working over a large empty catch tub in a closed room. Do not grip legs or lift the spider’s body. Routine handling brings fall and escape risk without supplying a husbandry resource. Irritating defensive hairs can reach the eyes during substrate work, so use appropriate protection and avoid touching your face after servicing the enclosure.
Before arrival, run the furnished setup through normal room day and night. Confirm soil support, drinking access, closure, air readings and drying. Obtain source, identity, sex/stage if known, last molt and meals. Favor traceable captive-bred stock; the Chilean assessment identifies collection and habitat disturbance as concerns, but does not provide current import permission.
Check security and water daily and spot-clean food remains, waste and contaminated material while preserving the retreat. Prepare an appropriate enclosure, sufficient soil, low cork, shallow dish, independent thermometers, feeder supplies, long tools and cup. Price continuing supplies and veterinary care over the possible female lifespan.
Escalate condition changes instead of labeling every fast normal
Seek prompt invertebrate-capable veterinary advice for fluid loss or trauma, persistent collapse or inability to stand, abnormal mouth material/discharge with feeding difficulty, or an incomplete molt with deterioration. Progressive shrinkage also warrants a review of drinking, successful meals and health. Food refusal alone does not diagnose parasites, dehydration or a harmless seasonal pause.
Send clear photographs together with source/stage, molt and food records and actual environmental readings. Do not use household pesticides, guessed medication, forced drinking or manual shedding. Eye exposure to defensive hairs also warrants medical advice. Clinical guidance is general tarantula evidence, and the exact combined species protocol has not had an independent veterinarian review.
Sources & further reading
Read the full recommendations and check details for your animal, equipment, and local conditions.
- World Spider Catalog: Grammostola rosea
- Species care guide: grammostola rosea
- Tarantula Care
- Care and Keeping of Tarantulas / When Your Pet Has Eight Legs
- Basic guide to keeping
- Ficha final de antecedentes de especie: Grammostola rosea
- Chilean rose tarantula
Original Creature Corner guide. Editorial fact and citation checks are recorded; independent veterinary review has not been performed.
