As you may know, the idea here is to build a frame strong enough to attach a large number of individual tree seedlings to, while still resembling a tree.
Doug Philips used wood frames first, then moved on to copper spirals soldered together. You could use “hardware cloth” or some other material, too.
I opted to use chicken wire for my first “tree.” Here’s what I came up with:
You will get a sense of its size in upcoming posts.