# 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](https://alex-plugins.gitbook.io/ouranos/customization/building "mention")) 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](https://alex-plugins.gitbook.io/ouranos/customization/biome "mention")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.