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There is a special construction you are able to make on One-block, which are Greenhouses.

Greenhouses are made out of glass and must contain the blocks found in the Biome Recipe to be valid. There is a recipe GUI. Once built, the greenhouse can be used to grow plants with bone meal, and it may spawn biome-specific mobs. If you include a hopper with water in it, snow will form inside the greenhouse when it rains. If you put bone meal in the hopper, biome-specific plants will grow. Some blocks can also transform over time due to "erosion".

The features of a greenhouse are:

  • Craft your own self-contained biome greenhouse on an island (or elsewhere if you like)
  • Greenhouses can grow plants that cannot normally be grown, like sunflowers
  • Friendly mobs can spawn if your greenhouse is well designed - need slimes? Build a swamp greenhouse!
  • Blocks change in biomes over time - dirt becomes sand in a desert, dirt becomes clay in a river, for example.

Before building a greenhouse, be sure to check the rules for the greenhouse, type /ob greenhouse this is open the GUI for all available greenhouses.

How to build a greenhouse:
  1. Make glass blocks, then build a rectangular set of walls and flat roof with at glass.
  2. Put a hopper in the wall or roof.
  3. Put a door in the wall so you can get in and out.
  4. Type /ob greenhouse and read the rules for the greenhouse you want.
  5. Exit the GUI and place blocks, water, lava, and ice so that you make your desired biome.
  6. Type /island greenhouse make again and click on the biome to make it.
  7. Type /island greenhouses help to see other options.
To remove a greenhouse type /ob greenhouse remove