Tea Leaves are an item added by the food plus mod as a crafting ingredient.
Uses[]
Tea Leaves are used to create Dried Tea Leaves, which are an ingredient in the various flavors of Tea.
It cannot be eaten on its own.
Harvesting[]
These items are found randomly while breaking grass, much like generic Minecraft seeds.
Farming[]
Unfortunately, there is currently no renewable way to obtain tea leaves through farming, as there isn't a way to replant and grow your own tea leaves.
A plant, known as a "Tea Leaves Bush" does exist in the latest version of the mod, but it cannot be planted with either Tea Leaves, Dried Tea Leaves, or even a Tea Bag. So you'll just have to wait on growing your own personal tea garden.
A line of the Tea Leaves Bushes in various stages of growth, spawned in from Creative gamemode.