🐾 Brontosaurus Pet in Grow a Garden — Mythical
Brontosaurus is a Mythical dinosaur from the Prehistoric Event, hatched from the Dinosaur Egg (1%) or made with the DNA Converter. It improves the pets you hatch: each one comes out with a bigger base size and weight.
Last verified against the Brontosaurus page and the ability data on the Grow a Garden wiki.
Dinosaur Egg, 1%.
📋 Brontosaurus at a glance
| Rarity | Mythical |
|---|---|
| How to get | Dinosaur Egg (1%) or the DNA Converter |
| Hunger | 80,000 |
| Ability (wiki wording) | Giant Incubator: Pets hatched from eggs have increased base size and weight! The bonus is capped at 30% per egg and does not apply to Brontosauruses. |
| Cooldown | None: it applies to every egg you hatch |
| Added | July 5, 2025 (Prehistoric Event) |
| Still obtainable? | No, per the wiki |
⚡ What Giant Incubator does
While the Brontosaurus is out, every pet you hatch from an egg gets a 5.25% bigger base size and weight. It doesn't work on pets from other sources, and it doesn't work on new Brontosauruses.
Base weight is the number every later age multiplies (weight = Age-1 weight × (age + 10) ÷ 11), so a 5% heavier hatch stays 5% heavier all the way to age 500. A heavier pet also has stronger ability numbers.
📈 Brontosaurus stats by weight
| Pet weight | Size and weight bonus |
|---|---|
| 10 kg | 6.25% |
| 50 kg | 10.25% |
| 100 kg | 15.25% |
| 500 kg | 19.55% |
The bonus climbs 0.1% per kilogram: 15.25% at 100 kg. Above 100 kg each kilogram counts for less, so the 30% cap would take more than 1,500 kg.
⚡ See Brontosaurus's ability at your pet's weight →
❓ FAQ
What does the Brontosaurus do in Grow a Garden?
Pets you hatch from eggs get 5.25% or more extra base size and weight (15.25% at 100 kg, 30% max). It doesn't affect hatched Brontosauruses.
Does the Brontosaurus work on crafted or shop pets?
No. The wiki says it only works on pets hatched from eggs.
How do you get a Brontosaurus?
It hatched from the Dinosaur Egg with a 1% chance, or came from the DNA Converter, during the Prehistoric Event.