Welcome to the boards/first post
That is some tree! Similar but not the same there is this pattern on Etsy -- add some borders and I think you are close to bed sized:
https://www.etsy.com/listing/6635164...for?sts=1&dd=1
This one is also a contender on close, again would need some borders:
https://www.etsy.com/listing/1534922...ttern-pdf?dd=1