> For the complete documentation index, see [llms.txt](https://alex-plugins.gitbook.io/ouranos/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://alex-plugins.gitbook.io/ouranos/customization/tree.md).

# Tree

On this page you will learn how to create custom trees for your custom biomes

### Step 1 - Create your trees xml file

Follow the serialization tutorial (see [Building](/ouranos/customization/building.md)) to create every tree you need

### Step 2 - Place your xml files

First create a new tree folder into the folder located at /plugins/Ouranos/trees/ and place every xml file you created in [Step 1](#step-1-create-your-trees-xml-file) into it.

### Step 3 - Add the trees into the biome configuration file

Now go into your biome configuration file you created into the [Biome](/ouranos/customization/biome.md)section and modify the **trees** property. The value must be the tree folder name you just created. After you've done that, trees are well configured for your biome.

### Optional change trees probabilities

You can change the tree probabilities if you want some trees to spawn more than other by modifying the probabilities into the /plugins/Ouranos/trees/trees.yml file.