Spiral Fern is a specific small-Kemono material for crafting; use a Ferntail Gecko as its targeted source.
PC / Global, final content update through 2023 patches
WHERE & HOW TO FARM
Where to farm
Ferntail Gecko habitat in Azuma; the Wildlife Cage Dragon Karakuri is the relevant structure for housing small Kemono.
If a recipe calls for Spiral Fern, focus on Ferntail Geckos rather than collecting Pet Kemono Seeds. Wild Hearts material references associate Ferntail Geckos with Spiral Fern and describe housing small Kemono in Wildlife Cages for specific materials. Confirm the material name in your inventory as you collect it, then keep the route focused on the recipe you need.
Access the region where Ferntail Geckos are found.
Unlock the Wildlife Cage Dragon Karakuri.
Have enough regional Dragon Karakuri capacity for a cage.
Check your crafting recipe or inventory to confirm Spiral Fern is the material you need.
Search explored areas for Ferntail Geckos, using the in-game map and habitat information to narrow your search.
Use the in-game interaction available for small Kemono to obtain a Ferntail Gecko for housing.
At a suitable location, open the Dragon Karakuri construction menu and place a Wildlife Cage if regional capacity allows.
Use the cage’s available interaction to house the Ferntail Gecko.
Continue exploring or hunting, then return to check the cage and collect any Spiral Fern it has produced.
Review your inventory and use the Spiral Fern in the intended recipe.
Farming tips
Verify the creature and material names in the Cyclopedia or inventory so you do not confuse Spiral Fern with another small-Kemono drop.
Check regional Dragon Karakuri capacity before placing the cage; its allowance depends on the relevant Dragon Pit resources.
Repeat, collect and use
This is a repeatable collection route while you have a Ferntail Gecko housed and need more Spiral Fern. Check the cage periodically and collect available output; no fixed production interval is assumed.
Common mistakes
Expecting an immediate item on placing the cage: continue playing and check the structure again later.
Using a different small Kemono: the stated Spiral Fern source is the Ferntail Gecko.
Ignoring the regional capacity limit: check the Dragon Karakuri menu and expand the relevant Dragon Pit if needed.
When to stop or switch
Stop collecting when you have enough Spiral Fern for the planned crafting use, or switch to another material goal if the cage is not producing the item you need.