The Necrotic mutation is another brand-new limited-tier mutation in Grow a Garden.
Like other rare mutations, it was first introduced during the second part of the Halloween Event.
Applying it is fairly simple once you have a specific pet that helps trigger the mutation on fully grown crops.
However, obtaining this pet isn’t easy, and future updates may allow this mutation to be triggered by certain weather events.
In this guide, we cover how to get the Necrotic mutation in Grow a Garden, including its multiplier, appearance, and other details.
Necrotic Mutation Multiplier Grow a Garden Wiki

Necrotic Mutation
Multiplier
x8
How to Get
Can be applied by the Ghostly Dark Spriggan pet
Description
The mutated crop has a few sparkly effects on its rectangular top.
The Necrotic mutation gives a x8 multiplier to any fully grown crop it affects.
Meaning the crop’s selling value increases eight times.
It can only be applied by the Ghostly Dark Spriggan pet.
You can purchase this pet from the Creepy Critters Shop for 100 Candy Corn or 349 Robux.
Mutated crops have bright orange segments in the center with sparkling effects on their rectangular tops, giving your garden a distinct, glowing look.