1.) The walls need to be made out of glass and the roof too. The roof must have direct sunlight.. that means you can't block the roof. You can use stained glass if you want.
2.) You need a door. It can we a wooden door or iron door.
3.) You need a hopper. It can be placed in the walls or roofs of the greenhouse.
4.) You need to make sure you have all the blocks minimal to make the greenhouse.
NOTE: You cannot use glowstone inside your greenhouse at all!
5.) Stand inside the greenhouse and use /greenhouse to open the menu. Then select the greenhouse you want.Block conversion:
When you place the required block in a greenhouse, it will turn into another block. (More info below)
Plant Spawn and Hoppers:
When you place bone meal in the greenhouse's hopper, the greenhouse will start spawning in plants such as grass and flowers. Likewise, some greenhouses will spawn blocks (Ocean Monument).
WARNING: When you use the bonemeal-hopper option, mob/animals spawning will decrease in the greenhouse.
Greenhouse:
Beach
Requires: Sandx1 and 50% Water of floor area.
Block Conversion: Cobble to Gravel
Plant Spawns: Dead Bush on sand
Mob Spawns: Squid in stationary water
Cold Beach
Requires: Sandx1, more than 30% Water, and more than 10% Ice block on floor
Block Conversion: Dirt to Sand
Plant Spawns:
Mob Spawns:Polar bear
Three Wolf Moon Forest
Requires: Log x3, Leaves x3, Grass x3, and Ice Block more than 10%
Plant Spawns: Lilac
Mob Spawns: Wolves
Cold Taiga Forest
Requires: Log x3, Leaves x3, Grass x3, and Ice Block more than 10%
Plant Spawns: Rose bush
Mob Spawns: White bunnies
Desert
Requires: Sand x1 (No water/ice allowed!)
Plant Spawns: Dead Bush and Cactus
Mob Spawns:
Flowery Forest
Requires: Log x3, Grass x4, Leaves x4
Plant Spawns: Grass, Peony, Daisy, Lilly of the Valley, Allium.
Mob Spawns: Sheep, donkey and chickens
Hell [cloud]
Requires: Netherrack x1, No water/ice allowed, More than 21% lava on floor
Block Conversion: Dirt to Soulsand
Plant Spawns:
Mob Spawns: Pigzombie/Magma Cube on netherrack, Ghasts in air
Jungle
Requires: Grass x4, Jungle logs x3, Jungle leaves x3
Plant Spawns: Watermelon, Fern, Poppy, Dandelion, Bamboo
Mob Spawns: Ocelot, chicken, parrot and panda.
Mushroom Island
Requires: Mycelium x2, 30% or more water on floor
Plant Spawns: Red/brown mushroom
Mob Spawns: Mushroom Cow and Bunnies
Ocean
Block Conversion: Stone to coral blocks.
Requires: 95% or more water on floor
Plant spawns: Coral & Coral fans on their blocks
Mob Spawns: Squids, tropical fish and dolphins
Horse Plain
Requires: Grass x3
Plant Spawns: Sunflower, grass
Mob Spawns: Cow, sheep, horses
Clay River
Requires: Sand x1, and 50% or more water coverage on floor
Block Conversion: Dirt to clay
Plant Spawns: Sugarcane on sand
Mob Spawns:
Savannah
Requires: Acacia/dark oak log x3, Acacia/dark oak leaves x3, Grass x4
Plant Spawns:
Mob Spawns: Brown Bunnies
Slimy Swamp
Requires: Grass x4, Logs x3, Leaves x4, 50% or more water on floor
Plant Spawns: Red/brown mushroom, blue orchid, water lily (on flat water)
Mob Spawns: Slimes and pigs
The End [aurora]
Requires: Endstone x4
Block Conversion: Stone to Endstone
Plant Spawns: Chorus plant on endstone
Mob Spawns: Endermite and Endermen on end stone
Ocean Monument [sylph]
Requires: All Prismarine blocks x4, 75% or more water
Block Spawns: Prismarine, sea lantern, and sponge
Mob Spawns: Guardians on flat water
If you have any corrections or anything to add, feel free to comment below!!
