A mutation is a boost you slap onto a crop to multiply the cash it sells for. Wet barely nudges your income, while Fire ten-times it, and the gap between them is the whole game once your farm starts earning. Some you buy as sprays, some only drop during weather events, and a couple ride along with a pet or a crate.
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Spray Mutations
These come from sprays you buy in the Gear Shop and apply yourself, so you decide exactly which crop gets the boost and when. The cash price climbs fast as the multiplier grows, which is why the strongest ones are saved for your most valuable plants.
Wet
The cheapest mutation and a common early upgrade while you build cash.
- Availability
- Permanent
- Multiplier
- 1.35x
- How to get
- Apply the Wet Spray from the Gear Shop, or let it land during a Rain event.
- Spray price
- $10M
- Event chance
- 8%
- Stackable
- No
Frozen
A modest step up from Wet once your farm can spare the spray cost.
- Availability
- Permanent
- Multiplier
- 1.75x
- How to get
- Apply the Frozen Spray from the Gear Shop, or let it land during a Blizzard event.
- Spray price
- $750M
- Event chance
- 4%
- Stackable
- No
Autumn
Doubles crop value and is a reliable mid-tier spray buy.
- Availability
- Permanent
- Multiplier
- 2x
- How to get
- Apply the Autumn Spray from the Gear Shop, or let it land during an Autumn weather event.
- Spray price
- $850M
- Event chance
- 3.5%
- Stackable
- No
Void
A small bump over Autumn and the first billion-tier spray.
- Availability
- Permanent
- Multiplier
- 2.25x
- How to get
- Apply the Void Spray from the Gear Shop, or let it land during a Black Hole event.
- Spray price
- $1B
- Event chance
- 3%
- Stackable
- No
Radioactive
Triples crop value and is a strong target once you reach the billions.
- Availability
- Permanent
- Multiplier
- 3x
- How to get
- Apply the Radioactive Spray from the Gear Shop, or let it land during a Nuclear event.
- Spray price
- $10B
- Event chance
- 2%
- Stackable
- No
Rainbow
A big five-times jump and the first trillion-tier spray purchase.
- Availability
- Permanent
- Multiplier
- 5x
- How to get
- Apply the Rainbow Spray from the Gear Shop, or let it land during a Galaxy event.
- Spray price
- $1T
- Event chance
- 1%
- Stackable
- No
Cosmic
A high spray-only multiplier for established farms with deep cash reserves.
- Availability
- Permanent
- Multiplier
- 8x
- How to get
- Apply the Cosmic Spray, sold in the Gear Shop and also available through the Plant Rush shop.
- Spray price
- $25T
- Event chance
- -
- Stackable
- No
Bubblegum
One of the strongest buyable mutations, saved for high-value crops.
- Availability
- Permanent
- Multiplier
- 9x
- How to get
- Apply the Bubblegum Spray from the Gear Shop.
- Spray price
- $250T
- Event chance
- -
- Stackable
- No
Fire
The highest multiplier in the game and the top endgame spray target.
- Availability
- Permanent
- Multiplier
- 10x
- How to get
- Apply the Fire Spray from the Gear Shop.
- Spray price
- $1Qd
- Event chance
- -
- Stackable
- No
Farm
A four-times boost; public guides do not list its current spray price.
- Availability
- Permanent
- Multiplier
- 4x
- How to get
- Apply the Trucker Spray from the Gear Shop, or let it land during a Trucker event.
- Spray price
- -
- Event chance
- 1.5%
- Stackable
- No
| Image | Name | Description | Availability | Multiplier | How to get | Spray price | Event chance | Stackable |
|---|---|---|---|---|---|---|---|---|
| Wet | The cheapest mutation and a common early upgrade while you build cash. | Permanent | 1.35x | Apply the Wet Spray from the Gear Shop, or let it land during a Rain event. | $10M | 8% | No | |
| Frozen | A modest step up from Wet once your farm can spare the spray cost. | Permanent | 1.75x | Apply the Frozen Spray from the Gear Shop, or let it land during a Blizzard event. | $750M | 4% | No | |
| Autumn | Doubles crop value and is a reliable mid-tier spray buy. | Permanent | 2x | Apply the Autumn Spray from the Gear Shop, or let it land during an Autumn weather event. | $850M | 3.5% | No | |
| Void | A small bump over Autumn and the first billion-tier spray. | Permanent | 2.25x | Apply the Void Spray from the Gear Shop, or let it land during a Black Hole event. | $1B | 3% | No | |
| Radioactive | Triples crop value and is a strong target once you reach the billions. | Permanent | 3x | Apply the Radioactive Spray from the Gear Shop, or let it land during a Nuclear event. | $10B | 2% | No | |
| Rainbow | A big five-times jump and the first trillion-tier spray purchase. | Permanent | 5x | Apply the Rainbow Spray from the Gear Shop, or let it land during a Galaxy event. | $1T | 1% | No | |
| Cosmic | A high spray-only multiplier for established farms with deep cash reserves. | Permanent | 8x | Apply the Cosmic Spray, sold in the Gear Shop and also available through the Plant Rush shop. | $25T | - | No | |
| Bubblegum | One of the strongest buyable mutations, saved for high-value crops. | Permanent | 9x | Apply the Bubblegum Spray from the Gear Shop. | $250T | - | No | |
| Fire | The highest multiplier in the game and the top endgame spray target. | Permanent | 10x | Apply the Fire Spray from the Gear Shop. | $1Qd | - | No | |
| Farm | A four-times boost; public guides do not list its current spray price. | Permanent | 4x | Apply the Trucker Spray from the Gear Shop, or let it land during a Trucker event. | - | 1.5% | No |
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Event & Pet Mutations
You cannot buy these off a shelf. Some only land while a specific weather or developer event is live, one rides along with the Starfall Griffin pet, and Carnival comes out of crate rewards. They take patience or luck, but a few carry boosts you cannot get any other way.
Alien
Event-only roll, so you have to wait for the UFO event to chase it.
- Availability
- Event-only
- Multiplier
- 3.25x
- How to get
- Only lands during the Alien (UFO) weather event; it cannot be bought as a spray.
- Spray price
- -
- Event chance
- 2.5%
- Stackable
- No
Admin
Tied to developer-run events, so it is not something you can plan around.
- Availability
- Event-only
- Multiplier
- 5x
- How to get
- Only granted during Admin Abuse events run by the developers; not for sale.
- Spray price
- -
- Event chance
- -
- Stackable
- No
Honeycomb
A rare event roll with one of the lowest chances on the list.
- Availability
- Event-only
- Multiplier
- 6.5x
- How to get
- Only lands during the rare Queen Bee event; it cannot be bought as a spray.
- Spray price
- -
- Event chance
- 0.5%
- Stackable
- No
Starfall
Stacks on top of another mutation, so it can multiply an existing boost.
- Availability
- Pet-only
- Multiplier
- 4x
- How to get
- Applied by the Starfall Griffin pet rather than a spray or weather event.
- Spray price
- -
- Event chance
- -
- Stackable
- Yes
Carnival
Added in Update 5; it stacks like Starfall and comes from crate rewards.
- Availability
- Crate-gated
- Multiplier
- 9.5x
- How to get
- Apply the Carnival Spray, pulled from Spray Crates earned through the Carnival Pass and Carnival Crate.
- Spray price
- -
- Event chance
- -
- Stackable
- Yes
| Image | Name | Description | Availability | Multiplier | How to get | Spray price | Event chance | Stackable |
|---|---|---|---|---|---|---|---|---|
| Alien | Event-only roll, so you have to wait for the UFO event to chase it. | Event-only | 3.25x | Only lands during the Alien (UFO) weather event; it cannot be bought as a spray. | - | 2.5% | No | |
| Admin | Tied to developer-run events, so it is not something you can plan around. | Event-only | 5x | Only granted during Admin Abuse events run by the developers; not for sale. | - | - | No | |
| Honeycomb | A rare event roll with one of the lowest chances on the list. | Event-only | 6.5x | Only lands during the rare Queen Bee event; it cannot be bought as a spray. | - | 0.5% | No | |
| Starfall | Stacks on top of another mutation, so it can multiply an existing boost. | Pet-only | 4x | Applied by the Starfall Griffin pet rather than a spray or weather event. | - | - | Yes | |
| Carnival | Added in Update 5; it stacks like Starfall and comes from crate rewards. | Crate-gated | 9.5x | Apply the Carnival Spray, pulled from Spray Crates earned through the Carnival Pass and Carnival Crate. | - | - | Yes |
Picking the right mutation to chase
The multiplier is the number that matters, but the price tells you whether it is worth it yet. Cheap sprays like Wet and Frozen are fine early filler. The big jumps come from Cosmic, Bubblegum, and Fire, and those sprays cost enough that you want them on your best crops, not your starter plants.
Most mutations replace whatever was already on a crop, so spraying a new one wipes the old boost. Two break that rule: Starfall and Carnival both stack on top of an existing mutation, which turns a single boost into a much bigger one. Save those for a crop that already carries a strong multiplier.
Buying versus waiting
Sprays from the Gear Shop apply instantly, so you control exactly when and where a crop gets its boost. Event mutations like Alien, Honeycomb, and Admin only land while the matching weather event or developer event is running, so they come down to luck and timing. If you put a mutation on the wrong crop, the Acid Spray strips it back off for $1M so you can start over. Cosmic is a little different from the other sprays: alongside its cash cost it also asks for Plant Tokens, so check your token balance before you commit.
FAQ
What is the best mutation in Build A Ring Farm?
Fire has the highest multiplier at 10x, so it gives the biggest single boost to a crop's sell value. Carnival sits just under it and has the bonus of stacking on top of another mutation.
Do mutations stack in Build A Ring Farm?
Most do not. Spraying a new mutation replaces the one already on a crop. The exceptions are Starfall and Carnival, which both layer on top of an existing mutation to multiply the boost even further.
How do you apply a mutation?
Buy a spray from the Gear Shop and use it on a crop to apply that mutation instantly. Others arrive on their own during weather events, from the Starfall Griffin pet, or from crate rewards.
Can you remove a mutation?
Yes. The Acid Spray strips the current mutation off a crop for $1M, which lets you reapply a different one if you boosted the wrong plant.
Are event mutations better than sprays?
Not always. Sprays let you choose the timing and the crop, while event mutations depend on the right event showing up. A few event boosts like Honeycomb and Admin are worth waiting for, but for steady progress the buyable sprays are easier to plan around.
