Rose hair tarantula Lifespan Calculator

Rose hair tarantula lifespan

The rose hair tarantula lifespan is one reason this spider has long been a first tarantula. Zoo New England, which keeps the species at Franklin Park Zoo, gives females 15–20 years "or possibly longer". Smithsonian's National Zoo says females live up to 20 years in human care, and the University of Kentucky's entomology department gives 15 years or more. So for a female, plan on two decades.

That answers how long do rose hair tarantulas live in a typical home, but the start of the clock matters. Many Chilean roses in the pet trade were wild-caught adults (Wikipedia notes large numbers were exported cheaply from Chile), so an adult bought from a shop may already be years old. A captive-bred sling with a known hatch date gives the calculator its best input.

Chilean rose tarantula lifespan in numbers

• Females: 15–20 years (Zoo New England); up to 20 in human care (Smithsonian); 15+ (University of Kentucky).
• Males: often no more than 2–3 years (Zoo New England); 4–5 at most (University of Kentucky).
• Longest documented male: about 8.5 years, three of them as an adult, in one captive male (Cortés-Fossati & Martín-Rodríguez 2022).

The Chilean rose tarantula lifespan figures above come from zoos and a university, not from sellers. The calculator uses 15–20 years for females and 2–5 years for males, with 20 and 8.5 years as the longest documented ages.

Female vs male rose hair tarantula lifespan

Male Chilean roses mature, look for a mate and die. Smithsonian's National Zoo says males pass away a few months after mating; Zoo New England says they often don't live past 2–3 years. The calculator therefore shows a mature male's time left as a range after his maturing moult rather than counting down to an average.

The 2022 case report shows the range is wide. Its male, kept at room conditions in a Mediterranean climate, refused food for most of his adult life — his longest fast lasted 22 months — and still lived about three years after maturing (Cortés-Fossati & Martín-Rodríguez 2022). Treat that as the exception, not the plan. For hooks, palpal bulbs and moult sexing, see the male vs female tarantula guide.

Rose hair tarantula growth rate and size

The Chilean rose is a medium-sized ground tarantula. Smithsonian's National Zoo gives adult females an average leg span of 5 in (12–13 cm) and males closer to 3.5 in (9 cm), though males have proportionally longer legs. The University of Kentucky gives 4–5 in, and Zoo New England 5–6 in.

Growth is gradual. Smithsonian expects a spiderling to moult five or six times in its first year, after which moults get further apart. No zoo or study gives a maturity age for this species; for its subfamily, the Theraphosinae, females typically mature at 5–10 years (Criscuolo et al. 2010). That slow start is one reason the adults live so long.

Care that helps a rose hair tarantula live longer

The University of Kentucky groups the rose hair with the red-knee and Brazilian black as species that share one simple care plan. Its points, with the reasons they matter for lifespan:

• A 5–10 gallon tank, one spider each: tarantulas live alone; a low tank also keeps any fall short.
• 3–5 in of organic potting soil, peat or coco fibre: untreated soil avoids pesticides and fertiliser.
• Moderate humidity: a little above normal room air; a water dish is usually enough. A soaked enclosure is not needed.
• Room temperature up to about 85 °F (29 °C).
• An escape-proof lid with air holes: air exchange reduces mould.
• Hands off: the university advises not handling tarantulas at all.

Chilean roses can flick irritating hairs when disturbed (Smithsonian's National Zoo), and the National Wildlife Federation says these cause minor irritation in people — worse in the eyes. Wash your hands after tank maintenance. For a stuck moult or an injury, look for an exotic vet who treats invertebrates; we give no medication advice.

Chilean rose, Grammostola rosea or G. porteri: the naming confusion

For years, the spider sold as the "Chilean rose hair" went by two scientific names. Hobby books and dealers used both Grammostola rosea and Grammostola porteri, and colour forms with redder or greyer hair were sometimes treated as different species. Wikipedia lists the common names rose hair tarantula, Chilean fire tarantula and Chilean red-haired tarantula, depending on the colour form.

The question was settled in the scientific literature: Montes de Oca, D'Elía and Pérez-Miles (2016) treated G. porteri as a junior synonym of G. rosea, and the World Spider Catalog, the standard reference for spider names, lists it that way. So a "porteri" from a shop is a rose hair. That matters for lifespan research too: older figures quoted for "porteri" belong to the same species.

The name Grammostola rosea dates to Walckenaer in 1837 (World Spider Catalog). Searching for a Grammostola rosea lifespan or a Chilean rose hair tarantula care sheet will find the same animal under any of these names.

How this rose hair tarantula calculator works

The calculator uses one shared table for every tarantula page. For the rose hair, females use 15–20 years (average 17.5) and males 2–5 years (average 3.5). Percentage used is age divided by that average. A 1-year-old female has used about 6%, a 4-year-old about 23% and a 12-year-old about 69%.

Because no maturity age is published for this species, a female older than one year is shown as "juvenile or adult": her size and moult rhythm tell you more than the calendar. Tell the calculator if a male has matured, and his time left switches to the 1–2 year post-maturity range (Criscuolo et al. 2010). Ages above the 20-year zoo figure show a "beyond typical" message.

Frequently asked questions

General information only — no medication advice. For a stuck moult or injury, see an exotic vet who treats invertebrates.