The Brontosaurus is a Mythical pet from the Prehistoric Event, first added on July 5th, 2025. It quickly became a collector's favorite due to its towering appearance and unique passive ability. Originally available from the Dinosaur Egg with a 1% hatch chance or through the DNA Converter, the Brontosaurus is now unobtainable in-game. Today, its rarity, trading value, and distinctive mutations make it one of the most iconic pets in Grow A Garden.

The Brontosaurus resembles a classic, long-necked dinosaur with blocky, voxel-style proportions. Its default skin features earthy tones of green and brown, giving it a prehistoric vibe. With its towering neck and large body frame, it stands out as one of the largest Mythical pets in the game, perfectly fitting its ancient dinosaur theme.
Since the Brontosaurus is no longer obtainable in-game, the only way to secure it now is through safe marketplaces. At U4GM, you can purchase the Brontosaurus for $1.15, making it one of the most affordable Mythical dinosaurs compared to its trading value. This makes it ideal for collectors and competitive players who want a legacy pet without relying on trading scarcity.
For players seeking legacy pets at reliable prices, the Brontosaurus remains a standout choice, and the grow a garden items shop at U4GM ensures a secure and affordable way to add this Mythical dinosaur to your collection.
The Brontosaurus has one of the most diverse mutation sets, giving it dramatically different appearances across 18+ forms.
| Mutation | Description |
|---|---|
| Aromatic | Golden-green tones with a fragrant aura. |
| Ascended | Radiant white glow, almost angelic. |
| Corrupted | Deep crimson red with sinister vibes. |
| Fried | Brown-gold, resembling roasted food. |
| Frozen | Icy blue form radiating cold energy. |
| GiantBean | A green, quirky beanstalk-themed mutation. |
| Glimmering | Brightly glowing with golden light. |
| Golden | Shiny golden scales, prestige look. |
| Inverted | Color-inverted form, unique contrast. |
| IronSkin | Dark metallic body, armored appearance. |
| Mega | Oversized and bulkier Brontosaurus. |
| Radiant | Yellow-white glowing skin with aura. |
| Rainbow | Multicolored body, collector's favorite. |
| Shiny | Glossy, reflective texture. |
| Shocked | Pale glowing form with lightning-like energy. |
| Tiny | A miniature, cute version of the Brontosaurus. |
| Tranquil | Calm cyan-blue variant, peaceful vibes. |
| Windy | Earthy brown with a breezy effect. |
The Brontosaurus is a legendary piece of Grow A Garden history. With its Mythical tier, unique passive, and wide range of mutations, it remains a favorite among players who value both utility and collection prestige. While it can no longer be obtained through eggs or events, marketplaces like U4GM ensure that players can still add this prehistoric giant to their rosters. For its price and legacy status, the Brontosaurus continues to stand tall as one of the most iconic pets in the game.