Another thing that has been asked for a lot. Now in 1.13.
There are 3 types of saplings: Birch, Spruce and Oak. Each grows the respective tree:
Saplings can be obtained by crafting from leaves. Leaves do not drop them automatically when harvested.
I had a lot of reservations about this feature. I don’t know how well it will play with the survival aspect of the game, because it will essentially allow player to create an infinite supply of wood. So I made it more difficult than just planting a sapling and waiting. You have to plant it in area of proper temperature and humidity, which is different for every tree:
Oaks like warm areas (where grass has juicy green color)
Spruces like cold and snow.
Birches like something in between.
All trees need lots of humidity. If the area is dry (i.e. is close to a desert, grass has yellowish hue there), it is very difficult for the sapling to survive. Note: presence of water does not mean the area is humid, watch color of the grass and leaves.
Good indication of suitability of an area for a given tree is presence of naturally grown trees of given type there. They use the same criteria as saplings to grow/not grow.
You also have to make sure that trees have enough space to grow. If there is not enough space, the sapling will die. In general it is a good idea to plant lots of saplings near to each other so that at least some will grow. Growth is a probabilistic process. If you plant a tree in a wrong place the sapling turns into a dry bush:
In creative mode trees grow very fast, less than 20 seconds. In survival you’ll have to wait about a day or so to see the tree, or a dry bush more often :-) You don’t need to be around for the tree to grow.
That’s it for now. I have 1.13 almost ready to go out tomorrow.