Trees: what they're made of and how they grow

• a log and leaves, which are plain blocks: your own, or any vanilla block such as oak_log and cherry_leaves;
• a sapling (type: flora with sapling:), if players should be able to grow it;
• the tree (type: flora with tree:), which says what it’s made of and how it’s shaped.

willow_log:
  type: block
  name: "<#8B6F4E>Willow Log"
  textures:
    top: willow_log_top.png
    side: willow_log.png
  rotation: axis              # lies along the way it's placed, like logs
  hardness: 2
  tool: axe

willow_leaves:
  type: block
  name: "<#7FA650>Willow Leaves"
  texture: willow_leaves.png
  transparent: true           # see-through, like leaves
  hardness: 0.2
  tool: hoe

willow_sapling:
  type: flora
  name: "<#7FA650>Willow Sapling"
  texture: willow_sapling.png
  sapling: {}

willow:
  type: flora
  tree:
    sapling: willow_sapling   # grows from it
    log: willow_log
    leaves: willow_leaves
    height: 7..11
    trunk-width-bottom: 2
    lean: 0.3
    branchiness: 0.5
    leaf-fluffiness: 0.7
    canopy: weeping

​

Two ways to shape a tree

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How a tree grows

• It only grows if its trunk and branches have room. Wood may replace air, plants, leaves, walk-through and see-through Lode Items blocks, and the sapling itself. If anything else is in the way, nothing is placed and the sapling stays and tries again later.
• Leaves only go where there is room: air and plants. They never replace other blocks.
• Vanilla leaves get their real distance to the wood, so they decay when the tree is cut down, just like natural ones. Leaves that would be too far from any wood to stay are left out.

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Trying a tree out

/lodeitems tree willow ~ ~ ~

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Not yet supported

• Your own leaves blocks never decay, even when the tree is cut down. Vanilla leaves do.
• Protection plugins can’t stop a sapling growing a tree into the area they protect.
• 2x2 saplings that grow giant trees, like dark oak and jungle saplings.