🪻 Bush Block

Bush Block can only survive on specific blocks directly beneath it — like flowers or saplings. If the supporting block is destroyed or invalid, the bush breaks.

It can optionally stack: when stackable is enabled, multiple bushes of the same type can pile on top of each other up to max_height. A stacked bush counts the same-type blocks below it.

Immediately after placement the block checks its support. If delay is set to a positive value, the check is postponed by that many ticks instead of running instantly on every neighbor update — useful for bushes that should survive brief block-replacement transitions.

What	How
Blacklist mode (blacklist: true)	The bush can grow on any block except those listed.
Whitelist mode (blacklist: false)	The bush can only grow on blocks listed.

Example

blocks:
  default:fairy_flower:
    behavior:
      type: bush_block
      blacklist: false                # true = blacklist, false = whitelist
      stackable: false                # allow same-type stacking on top of each other
      max_height: 0                   # max stack height, only meaningful when stackable is true (>1 required)
      delay: 0                        # check delay in ticks, 0 = instant break on invalid support
      bottom_blocks:                  # specific blocks to check (optional)
        - custom:xxx
        - minecraft:stone
      bottom_block_tags:              # block tags to check (optional)
        - minecraft:dirt
        - minecraft:farmland