Oak

An oak tree is the most common tree in the game, available in several variants. It has the smallest space initial space requirement for growth, and along with dark oak trees it can drop an apple when a leaf block is destroyed.

Variants
Oak trees come in several variants with widely different properties:
 * 1) Small regular oak trees are the most commonly encountered.
 * 2) Large "fancy" oak trees are more uncommon and have a distinct look and different growth requirements. They often have "branches", outgrowths of logs on the sides of the trunk, or even freestanding and surrounded by leaves. They require 4–14 blocks of open space directly above the sapling to grow (air or leaves only) but can otherwise be completely enclosed on all sides.
 * 3) * A fancy tree form (the balloon oak tree; see below) exists with a single leaf block layer above the minimal 4-block trunk, allowing a tree to rarely grow in a vertical space with a height of only 5, but otherwise the maximum trunk height is 2 less than the vertical space, making the practical minimum height 6.
 * 4) * A fancy tree can be forced to be grown if a "brace" of non-solid blocks (e.g. glass, or slabs) is placed around where the trunk would be, one block off the ground.
 * 5) * A rare variant that is colloquially known as a "balloon" oak, which are fancy oak trees generated with the smallest size possible, may be grown. They consist of tall trunks and leaves that formed a spherical shape, similar to a balloon. They grow even if there is a block obstructing them; they simply grow around that block. They usually contain 4 blocks of logs, but some may contain more.
 * 6) In swamp biomes, naturally occurring oak trees tend to grow in the water. Unlike oak trees in other biomes, which typically have a slightly conical or pointed canopy, all swamp trees have round, flat-topped canopies. Also unlike other oak trees, these have a much wider range in foliage. They tend to be covered in vines that trail down to the ground.

An oak tree with a unique arrangement of leaves is generated at meeting point 3, in plains villages. This leaf arrangement is not found elsewhere naturally, and it cannot be grown from a sapling.

Breeding
Oak trees require a 1×1 column of unobstructed space at least 4 blocks above the sapling to grow (5 blocks including the sapling itself). Oak trees are unique in that they can still grow when the base and trunk are enclosed on all sides. Their growth is not hindered by logs, leaves, dirt, and saplings.

An oak tree grown from a sapling within 2 blocks of a flower has a 5% chance of having a bee nest containing 2 bees.

Fallen oak trees
These trees consist of a single upright log, or stump. Logs lying on their side are often found 1–2 blocks from the stump. They occasionally have mushrooms on top.

A fallen oak tree has a log length of 4–7 blocks, and the stump is 75% covered with vines.

Trivia

 * Large jungle trees and dark oak trees generate with dirt under them if they generate partly or wholly over air or water blocks.
 * Oak, acacia, and spruce are genera of trees. In real life, the trees "jungle" and "dark oak" do not exist. The oak tree is based on the real Quercus alba, commonly known as White Oak. The spruce tree is based on the Picea glauca, commonly known as the White Spruce. The dark oak tree is based on Quercus veluntina, commonly known as Black Oak. The acacia tree is based on Vachellia tortilis, commonly known as the umbrella thorn acacia.