Pet Growth Mechanics & Weight Analysis

The Science of Hatch Weight

In **Grow a Garden**, every pet is born with a hidden attribute known as **Hatch Weight (Wh)**. This single value determines the entire growth trajectory of the pet. While you can only see the "Current Weight" in-game, the Hatch Weight is the true indicator of a pet's genetic potential.

Our research team has decoded the engine's weight formula, allowing you to calculate this hidden attribute with surgical precision.

The Growth Equation

Current Weight = (Wh / 11) × (Age + 10)

Where **Wh** is the Hatch Weight attribute and **Age** is the pet's current years.

Entity Grading System

Based on the Hatch Weight attribute, pets are categorized into five distinct tiers. Knowing your pet's grade is essential before entering high-stakes trade negotiations.

Small

Wh < 1.0kg

Common companions with linear growth.

Normal

Wh 1.0 - 5.0kg

The standard for active farming pets.

Huge

Wh 5.0 - 7.0kg

Rare genetics with accelerated scaling.

Titanic

Wh 7.0 - 9.0kg

Extreme rarity. Highly sought by collectors.

Godly

Wh > 9.0kg

The 0.01% genetic tier. Maximum value.

Aging and Maturation

Pets age every 15 minutes of active playtime (or "AFK farming" in specialized zones). As they age, their mass increases following the **Scaling Trajectory**. An "Elder" pet (Age 100+) with "Titanic" genetics can weigh over 80kg, making it a massive asset for trade.

Juvenile Phase (Age 0-20)

The most volatile phase. Growth is rapid, and small differences in Hatch Weight are not yet visible.

Adult Phase (Age 20-100)

The growth curve stabilizes. This is the best time to calculate the exact Hatch Weight for trading.

Elder Phase (Age 100+)

Peak physical mass. Elder pets carry a "Prestige" bonus in the trading community.

Trading Tip: The Weight Trap

Never accept a trade based on current weight alone. A 5kg pet at Age 1 might look "heavier" than a 4kg pet at Age 20, but the second pet has far superior genetics (Hatch Weight). Use our **Hatch Weight Normalizer** before every trade to ensure you aren't being scammed by "Faux Weight" pets.