Mutations in Grow a Garden 2: a complete explainer

A mutation is a status effect applied to a growing crop that multipliesthe crop's sell value. The mutation is rolled when an eligible trigger fires — a weather event, a pet aura, a gear effect, or a special seed — and once applied, the multiplier stays on the crop until it is harvested.

Mutations are not rarity boosts and they do not change crop type. A mutated Strawberry is still a Strawberry; it just sells for more. The full sell-value formula is base × weight² × mutation_mult — mutations are the third multiplier on top of base value and the squared weight factor (explained in the economy basics guide).

Eight mutations ship with the game. Each is detailed on its own page with the full source conflict; the table below lists the adopted multiplier and primary trigger.

• Gold — variant, ×10. From pets, weather, gear, or golden seeds (Golden Dragonfly pet doubles the chance).
• Rainbow — variant, ×30. From Rainbow weather (Unicorn pet doubles the chance).
• Aurora — variant, ×90. Aurora Borealis weather event (night, ~2 min duration).
• Shocked — weather, ×100. Lightning-related; exact trigger not yet confirmed.
• Bloodlit — weather, ×60. Applied during the Blood Moon weather event.
• Electric — weather, ×25. From the Lightning weather event.
• Starstruck — weather, ×50. Chance to apply during Starfall weather.
• Frozen — weather, ×14. From pets, weather (Blizzard), or freeze gear.

The mutation system has two distinct stacking rules:

• Variants are mutually exclusive. A crop can hold onevariant at a time — Gold, Rainbow, or Aurora. Gold and Rainbow are confirmed mutually exclusive; community calculators often favor Rainbow when both could roll. Aurora's mutual exclusivity with Gold/Rainbow is pending verification, so its stacking behavior with them is not yet confirmed in-game.
• Weather mutations stack additively with each other and compound multiplicatively with the selected variant. The community-documented formula is:

variant_mult   = selected_variant ? selected_variant.mult : 1
weather_sum    = sum(active_weather_mutation.mult)
weather_count  = count(active_weather_mutation)
mutation_mult  = variant_mult × (1 + weather_sum − weather_count)

The − weather_count term matters: each additional weather mutation you stack replaces its base ×1 with its own multiplier, so the marginal value of the Nth weather mutation is its full multiplier minus one. Community calculator models suggest stacking multiple weather mutations can multiply value substantially; treat specific numbers from these models as planning estimates rather than confirmed mechanics, since the stacking formula is community-derived.

Five of the eight mutations are applied by weather events. The full weather catalog is on /weather; the mutation-to-weather mapping:

• Lightning (~2.5 min) → Shocked or Electric to random crops.
• Blizzard (~2.5 min) → Frozen.
• Blood Moon (~2 min) → Bloodlit.
• Starfall (duration not documented) → chance to apply Starstruck.
• Aurora Borealis (~2 min, night) → chance to apply Aurora.

Variants can also be weather-driven: Midas applies Gold, and Rainbow Moon applies Rainbow. See the weather events guide for the full event calendar.

Most mutation proc rates are not publicly documented. The one event we can speak about with any precision is Aurora Borealis — its effect description in our dataset flags a reported Aurora proc chance, but that number is community-reported and single-source. Beyond that, the community has only aggregate observations: e.g. "most crops do not get mutated even during an event — only a few rolls hit per plot."

We do not publish per-mutation proc-rate tables because the underlying data is not in our source bundle and any specific number would be fabricated. The two levers that are documented as affecting probability:

• Golden Dragonfly — doubles the chance of Gold.
• Unicorn — doubles the chance of Rainbow.

Treat any other published proc rate as unverified until it appears on a per-mutation page with a confidence badge.

Different community outlets publish different multipliers for the same mutation. We do not pick one and hide the rest. Every mutation in our dataset carries a source confidence badge from a four-level taxonomy:

• Official — Roblox API, patch notes, or official announcements.
• Cross-verified — multiple independent community sources report matching values.
• Likely (single source) — one community source; not yet cross-verified.
• Unconfirmed — speculation, unsupported reports, or no evidence no evidence.

Examples of live conflicts: Shocked is reported as ×100 by every source we track, but every one of those sources may trace back to the same launch-time calculator bundle — leaving it unconfirmed for lack of independent verification. Electric (media consensus ×25 vs a deprecated site) and Frozen (media consensus ×14 vs a deprecated site) both show large source discrepancies — exact spread percentages live on the complete multipliers page, which renders every reported value, labels the adopted one, and explains the adoption rule. Adoption follows a multi-outlet Council arbitration (2026-06-28): where Eurogamer, Rock Paper Shotgun, Beebom, and growagarden2wiki.net agree on a value, we adopt that majority over the launch calculator bundle.

The single highest-leverage play is to have high-base crops in the ground when a Special weather event fires. Empty plots earn nothing from weather. Concretely:

• Keep a baseline of multi-harvest crops planted at all times, prioritizing high base value (see /values).
• A common community strategy is to wait until the event ends before harvesting, on the assumption that mutation rolls apply to growing crops. This behavior is not independently verified.
• Equip the pet that doubles the variant you want most: Golden Dragonfly for Gold, Unicorn for Rainbow.
• For weather mutations specifically, no pet is documented to boost proc rate. Community calculators treat crop surface area as the main lever — more growing crops may mean more chances for a roll — but treat this as a planning estimate, not a confirmed mechanic.

Read the mutations strategy guide for the full decision tree.

Two pets in the game directly affect mutation probability. A third, the Ice Serpent, applies Frozen as part of its defense aura — a community-reported gear/pet trigger for the Frozen mutation outside Blizzard weather; treat as community-reported rather than independently verified.

• Golden Dragonfly — doubles the chance of the Gold mutation. Best paired with high-base crops during any weather that can apply Gold.
• Unicorn — doubles the chance of the Rainbow mutation. Best paired with crops in the ground during Rainbow Moon weather.
• Ice Serpent — applies Frozen to your plants as part of its defense aura. Community calculators model this Frozen as stackable with Blizzard-triggered Frozen; treat the stacking behavior as a planning estimate, not an independently verified mechanic.

No pet is documented to boost the proc rate of any weather mutation (Shocked, Bloodlit, Electric, Starstruck). For those, crop surface area is the only lever. See the pets strategy guide for the full pet roster and build-order recommendations.

Once you understand the stacking rules, the right way to use them is the profit calculator. Plug in:

1. A crop and its average weight (from /values).
2. The variant you realistically expect to land during the event (Gold, Rainbow, or Aurora).
3. The weather mutations that can stack during the event (e.g. Shocked + Electric during Lightning; Bloodlit during Blood Moon).
4. Quantity — how many crops you have growing in the affected plot.

The calculator outputs the projected sell value with the full mutation stack applied. Treat the result as a planning estimate, not a guarantee — proc rates are undocumented and several multipliers are still single-source. For the strategy layer on top of this workflow, see the money making guide.

Worked illustration: a Coconut (base 60 Sheckles, multi-harvest) at a 2.0 kg calculator model weight with no mutations sells for 60 × 2² = 240 Sheckles. Add Gold (×10) and the same crop sells for 60 × 2² × 10 = 2,400. Stack Bloodlit (×60) on top via a Blood Moon overlap and the formula gives 60 × 2² × 10 × (1 + 60 − 1) = 60 × 4 × 600 = 144,000 Sheckles from a single Coconut. The point of the calculator is not to promise that exact number — it is to show how sensitive the result is to which mutations you assume, so you can decide which events are worth preparing plots for. (Note: 2.0 kg is a calculator model weight; Coconut's documented average weight is on its detail page.)