Firefly Weight Calculator
LegendaryEverything about the Firefly in Grow a Garden. It is a Legendary pet that hatches at 1kg and grows to a maximum of 4kg. Ability: Applies Moonlit at night.
- Base weight
- 1 kg
- Max weight
- 4 kg
- Hatch chance
- 8%
- Cooldown
- 3h
Firefly analysis
Weight ranking
#23 of 25Firefly is the 23rd-heaviest pet by maximum weight, 48% below the 7.7kg average. The heaviest is T-Rex at 20kg.
Growth potential
4.0×Firefly gains 3.00kg between hatching at 1kg and its 4kg cap — it can grow to 4.0 times its starting weight. Every 25% of hunger you keep filled is worth about 0.75kg.
Rarity and odds
8%A Legendary pet with a 8% hatch chance, sharing that rarity with 4 other pets. Its 3h ability cooldown determines how often the ability below actually fires, which matters more than raw weight for farming value.
Ability value
3hApplies Moonlit at night. That applies the Moonlit mutation (×2), which contributes +1 to a crop's mutation bracket every time it lands.
Firefly weight by hunger fill
A pet's weight scales linearly with how well-fed it is: Weight = Base + (Fill% × (Max − Base)). Keep Firefly fed to push it toward its 4kg cap for maximum trade value.
| Hunger fill | Weight (kg) |
|---|---|
| 0% | 1.00 |
| 25% | 1.75 |
| 50% | 2.50 |
| 75% | 3.25 |
| 100% | 4.00 |
Firefly FAQ
How much does Firefly weigh in Grow a Garden?
Firefly hatches at 1kg and grows to a maximum of 4kg when fully fed — a gain of 3.00kg, or 4.0× its starting weight. That makes it the 23rd-heaviest of 25 pets.
What is the Firefly hatch chance?
Firefly is a Legendary pet with roughly a 8% hatch chance and a 3h ability cooldown. 4 other pets share its rarity tier.
What does the Firefly do?
Applies Moonlit at night. That is the Moonlit mutation (×2), which adds +1 to a crop's mutation bracket. With a 3h cooldown, this is how often you can expect that value to land.
Is Firefly good for trading?
Pet trade value is driven mainly by weight, and Firefly caps at 4kg (23rd of 25), which is below the 7.7kg average. Always confirm a pet is fully fed before trading, since a hungry Firefly can weigh as little as 1kg.