Want a forest of diamond? Maybe a jungle of glass? Make any kind of tree you want with the custom trees mod. This mod adds a new type of tree. The willow tree, which is also fully customizable.
First to craft a custom sapling, your gonna need any type of regular sapling and a golden nugget:
Next is the slightly more difficult (but still very easy) customization step! Simply place a block that you want to be the trunk of your tree, I’m gonna use glass, then place a block which you want to be the leaves of your tree, I’m using melons, and finally place your custom sapling on top of both of them.
When you’ve done that simply right click your custom sapling and voila! A magical custom tree made of whatever you want! You can use this to make trees out of almost any block in the game (including water and lava!) and make beautiful trees for any setting.
Before we get to the new trees, which are all also fully customizable. The trigger block is the block underneath your trunk block. For instance, the trigger block for palm trees is sand, so to trigger a palm tree.
Use sand as the trigger block for this new tree:
Soul sand is the trigger block to grow a willow tree