Bees need flowers to be able to produce combs and items. Most of the bees need regular flowers, but others need more exotic ones. To know which kind of flower the bee needs, the player must analyze it with a beealyzer. The flower a bee needs to feed on is also the flower it will pollinate. If a bee feeds on flower, more and more flowers will spawn on Dirt and Grass block around the apiary.
Book: Bookshelf
Cacti: Cacti
End: Dragon Egg
Flowers: Regular yellow or red flowers
Gourds: A fully grown pumpkin plant (not the pumpkin itself)
Jungle: Vines or Fern
Lily Pads: Lily pad
Magic Flowers: Cinderpearl or Shimmerleaf
Mushroom : Regular brown or red mushrooms
Nether: Netherwarts
Node: A node has to be nearby
None: The bee doesn't need to feed
Purify node: A pure node has to be nearby
Redstone: Redstone Torch
Reeds: Sugar Cane
Rock: Stone or Cobblestone
Wheat : Wheat (The wheat has to be fully grown for the bee to feed on it)