Grammostola grossa – Guarani Giant Tarantula | Docile Giant New World Species | Live Arrival Guarantee

Grammostola grossa – The Guarani Giant Tarantula

Size, life stage & quantity options

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• Size / stock option: 1-1.5"

Measurements are reproduced as listed in the ordering options. If you need a specific body length or leg span, please confirm the measurement with us before ordering.

For a quantity, sex, or life stage not specified in your chosen option, contact Isopod King before purchasing.

Meet one of South America's most impressive yet gentle giants. Grammostola grossa, the Guarani Giant Tarantula, combines substantial size with a famously docile temperament, making it an exceptional choice for both new and experienced keepers.

Why Choose Grammostola grossa?

• Gentle Giant: Known for its calm, handleable nature and reluctance to bite or flick urticating hairs
• Impressive Size: Reaches 7-8 inch leg span with a robust, heavy-bodied build
• Beautiful Coloration: Rich brown to black body with subtle golden or bronze highlights
• Hardy & Forgiving: Tolerates a wide range of conditions, perfect for beginners
• Long-Lived Companion: Females can live 20+ years with proper care
• Easy Care: Simple terrestrial setup with minimal maintenance required

Natural History

Native to the grasslands and scrublands of Uruguay, Paraguay, and southern Brazil, G. grossa is a burrowing species that creates deep retreats in the wild. This New World terrestrial thrives in moderate temperatures and appreciates a dry substrate with access to fresh water.

Care Requirements

• Enclosure: 5-10 gallon terrestrial setup with 4-6 inches of substrate for burrowing
• Temperature: 70-78°F (room temperature is typically fine)
• Humidity: 60-70% with a water dish; allow substrate to dry between moistening
• Diet: Crickets, roaches, and appropriately sized feeders once per week
• Temperament: Docile, slow-moving, and beginner-friendly

What to Expect

Your Grammostola grossa will arrive healthy and ready to settle into its new home. This species is an opportunistic burrower and may remodel its enclosure to suit its preferences. Growth is slow and steady, with females reaching full size in 4-6 years. You'll enjoy watching this gentle giant's calm demeanor and impressive presence for decades to come.

Live Arrival Guarantee: All specimens ship with our industry-leading live arrival guarantee. Your satisfaction and the health of your new tarantula are our top priorities.