Gloomthorns are one of two ancient trees that grow from a Surprising Seed. To grow a Gloomthorn seed into a sapling, the seed must meet one of the following conditions: it is currently Winter or the seed is planted on Marsh Turf. If both of these conditions are met but your character says that the seed can't grow when examined, it means that it is the seed for a Sproutrock. Otherwise, the seed will grow into a Gloomthorn Sapling after 3-7 days.
Once the seed has sprouted into a Gloomthorn Sapling, it will only continue to grow if both of the conditions are met. If they are, it will turn into a Gloomthorn after 8-12 days.
Gloomthorns will grow 4 Nightberries every 12 to 25 days provided it is still on Marsh Turf. The Nightberries can be picked only at night.
The timer for Nightberry regrowth is set upon creation of the seed and will stay the same throughout its lifetime and every harvest. Chopping the tree and replanting the seed will not change this regrowth timer. The regrowth timer will be reduced by 25% in Spring, despite the produce being edible.
Gloomthorns and their saplings are completely fireproof and cannot be ignited by any means, including wildfires.
Tips
Maxwell's Shadow Servants will not mine or harvest the Gloomthorns.
Gallery
Gloomthorn concept art from Staying Afloat update stream from Rhymes with Play.
Gloomthorn concept art from Staying Afloat update stream from Rhymes with Play.
Attention: The following categories are only for the players look up the page based on their first impression, they have nothing to do with the actual categories/DLC/function/tags of these Things. Some of them are not even .
Attention: The following categories are only for the players look up the page based on their first impression, they have nothing to do with the actual categories/DLC/function/tags of these Things. Some of them are not even .
Attention: The following categories are only for the players look up the page based on their first impression, they have nothing to do with the actual categories/DLC/function/tags of these Things. Some of them are not even .
Attention: The following categories are only for the players look up the page based on their first impression, they have nothing to do with the actual categories/DLC/function/tags of these Things. Some of them are not even Structures.