How to use Minecraft Worldedit to make a tree that doesn't have normal leaves but flowers as drooping leaves?

I have a Minecraft server where I want the largest possible tree, but not with scrolling like this:

But with such flowers:

You could create your own texture pack, where you change the texture of black oak trees, for example, because they get big. Here is a link describing how to do that:

I hope I was able to help you somewhat.

{RedEyeGirl}

https://youtube.com/...iSF3caXTkw