Brainrot Portal weather in Grow a Garden: which mutations it gives
It is admin weather; its top multiplier ranks #16 of 109 weather types (tied with 7 others).
Facts
| Group | admin weather |
|---|---|
| Mutations it can give | 1 |
| Highest multiplier | Brainrot (x100) |
| Chance wording | The wiki says it raises the chance of the mutation |
| Top-multiplier rank | #16 of 109 weather types (tied with 7 others) |
The wiki files it as admin weather, which an admin starts, usually during Admin Abuse events. No duration is given for Brainrot Portal; for all weather the wiki says most last about 3 to 5 minutes, going by what players saw.
Mutations from Brainrot Portal
| Mutation | Multiplier | Carrot sells for (Sheckles) |
|---|---|---|
| Brainrot | x100 | 2,000 |
Worked example: a Carrot after Brainrot Portal
| Setup | Total multiplier | Sell value (Sheckles) |
|---|---|---|
| Carrot, no mutation | x1 | 20 |
| Carrot + Brainrot | x100 | 2,000 |
Carrot base value 20 Sheckles at 0.275 kg. Value = base value x mutation multiplier x variant x (weight / base weight) squared, and mutations add up instead of multiplying. The wiki says some fruits pass through an extra value curve it does not publish, so in-game prices can differ.
Open the Carrot with Brainrot in the calculator
All weather · All mutation multipliers · Sell value calculator
Questions
What mutation does Brainrot Portal give in Grow a Garden?
Brainrot Portal can give 1 mutation: Brainrot (x100).
How much is a Carrot worth after Brainrot Portal?
After Brainrot Portal, a Carrot at its base weight (0.275 kg) goes from 20 Sheckles to 2,000 with Brainrot (x100).
Is Brainrot Portal the only weather that gives Brainrot?
Yes, in the wiki's table only Brainrot Portal gives Brainrot (x100). Its top multiplier ranks #16 of 109 weather types (tied with 7 others).
Source: Grow a Garden Wiki pages Crop Mutations (rev 153516, Oct 13, 2026) for which weather gives which mutation, and Weather (rev 153029, Oct 3, 2026) for grow speed, chance wording and frequency. CC BY-SA 3.0. Weather and mutation names are the game's own; the wording is ours and no wiki images are used. Checked Oct 15, 2026. This is the original Grow a Garden, not Grow a Garden 2. Not affiliated with Roblox Corporation or the game developers.