Petals

Petals=

Dark Petals=

Foliage=

"I have destroyed something beautiful."

- Wendy

Petals are a Vegetable Food item obtained by picking Flowers, which are commonly found in Grassland biomes. They restore 5 Sanity when picked and 1 Health point when eaten. Like other vegetables, they can be fed to Pigs to produce Manure. Neither variant of petals can be used in a Crock Pot.

Petals can be used to craft a Garland, a headwear item which restores Sanity over time.

Dark Petals
Dark Petals are obtained by picking Evil Flowers that spawn around the Things, Maxwell's Door or a Totally Normal Tree. Evil Flowers drain the player's Sanity by 5 when picked. Dark Petals can be eaten to drain an additional 5 Sanity points or used to craft Nightmare Fuel using a Shadow Manipulator or a Prestihatitator.

Hiveless Bees are able to pollinate and create new Evil Flowers, making Dark Petals a renewable resource.

Foliage
Foliage is a Vegetable Food item obtained by picking a Fern. Similar to Petals, Foliage can be eaten to restore 1 Health or used as fuel in a Campfire or Fire Pit. They can also be crafted into a Potted Fern.

Reign of Giants
In the Reign of Giants DLC, Tumbleweeds may drop Petals, Dark Petals, or Foliage when harvested. Petals are also required to craft a Pretty Parasol.

Trivia

 * Dark Petals were added in the A Little Rain Must Fall update.
 * Foliage was added in the It's not a rock! update. When first implemented, it was green.
 * Petals used to be required to craft a Floral Shirt in the Reign of Giants DLC. It was later changed to require Cactus Flowers instead.