close

Weather events

Free mutations fall from the sky. Be ready.

Weather events are the only way to roll mutations without spending cash on Sprays. Each event has a chance to fire every cycle, and once it fires every plant rolls independently for its linked mutation.

Two rolls decide everything

A mutation needs both rolls to succeed: the event has to fire, then the plant has to land it.

EffectiveRate = eventChance × chancePerRoll

P(any plant mutates) = 1 − (1 − chancePerRoll)plants

Galaxy fires on ~4% of cycles and rolls Rainbow at 1% per plant, so the effective per-plant rate is 0.04%. A full farm raises the chance that at least one plant mutates.

Every weather event

Ranked from most frequent to rarest. The rarer the event, the bigger the multiplier.

Rain

Applies wet

1.35×
Harvest multiplier

Most frequent weather event — happens roughly 40% of the time. Applies Wet (1.35x) at 8% per plant roll.

Event activation
40%
Per-plant roll
8%
Effective rate (per plant, per cycle)
3.20%

Blizzard

Applies frozen

1.75×
Harvest multiplier

Snowstorm event that applies Frozen mutation at 4% per plant.

Event activation
20%
Per-plant roll
4%
Effective rate (per plant, per cycle)
0.80%

Autumn

Applies autumn

Harvest multiplier

Harvest season event that applies Autumn mutation (2x) at 3.5% per plant.

Event activation
15%
Per-plant roll
3.5%
Effective rate (per plant, per cycle)
0.53%

Black Hole

Applies void

2.25×
Harvest multiplier

Spatial anomaly that applies Void mutation at 3% per plant.

Event activation
12%
Per-plant roll
3%
Effective rate (per plant, per cycle)
0.36%

Nuclear

Applies radioactive

Harvest multiplier

Triples crop value via Radioactive mutation. Time large harvests around this event.

Event activation
7%
Per-plant roll
2%
Effective rate (per plant, per cycle)
0.14%

Galaxy

Applies rainbow

Harvest multiplier

Rarest standard event. Applies Rainbow (5x) at 1% per plant — the holy grail of free mutation events.

Event activation
4%
Per-plant roll
1%
Effective rate (per plant, per cycle)
0.04%

Alien Invasion

Applies alien

3.25×
Harvest multiplier

UFO scans your farm and applies the Alien mutation (3.25x) — event-only, no spray.

Event activation
2.5%
Per-plant roll
2.5%
Effective rate (per plant, per cycle)
0.06%

Trucker

Applies farm

Harvest multiplier

Trucker event applies the Farm mutation (4x) — event-only, no spray.

Event activation
1.5%
Per-plant roll
1.5%
Effective rate (per plant, per cycle)
0.02%

Queen Bee

Applies honeycomb

6.5×
Harvest multiplier

Interactive special event. Collect 5 Honeycombs → 1 Honey Token. Spend tokens at the Honey Pot for Honeycomb mutation (0.5%), Honeysuckle seed (37%), or Queen Blossom seed (0.1%). Lasts ~5 minutes.

Event activation
0%
Per-plant roll
0.5%
Effective rate (per plant, per cycle)
0.0000%

Plant Rush

Applies

Harvest multiplier

Interactive co-op event (Update 3). Defeat giant plants to earn Plant Tokens. Spend tokens at the Plant Rush shop for sprays, seeds, or Boss Boxes (Garden Golem 0.5%, Cosmic Spray 5%). Occurs ~hourly on public servers.

Event activation
0%
Per-plant roll
0%
Effective rate (per plant, per cycle)
0.0000%

What a full farm looks like

With 50 plants in the ground when the event fires. More plots means more independent rolls.

EventMultiplierChance ≥1 mutatesExpected mutated
Rain
1.35×98.5%4.00 plants
Blizzard
1.75×87.0%2.00 plants
Autumn
83.2%1.75 plants
Black Hole
2.25×78.2%1.50 plants
Nuclear
63.6%1.00 plants
Galaxy
39.5%0.50 plants
Alien Invasion
3.25×71.8%1.25 plants
Trucker
53.0%0.75 plants
Queen Bee
6.5×22.2%0.25 plants
Plant Rush
0.0%0.00 plants

Expected mutated = plants × per-plant roll chance. Chance ≥1 mutates = 1 − (1 − chance)^plants.