The Botanical Garden is an area that can be upgraded on the west edge of Caed Nua in Pillars of Eternity.
Once upgraded, it periodically creates plant ingredients used in Crafting and Enchantment. You can collect them in the treasure chest in the keep. However, they only appear when a companion completes an Adventure.
While it is a marked location, you cannot interact with it directly.
Description[ | ]
Upgrading the Botanical Garden will allow your stronghold to generate a random plant every turn in the stronghold treasury.