Peter Pett's Commentary on the Bible
Ezekiel 15 - Introduction
Chapter 15. A Depiction of Jerusalem - A Useless Wild Vine.
Here the vine is used as an example because its wood is useless for any other purpose than to be burned. Because of its nature, once it ceases to be fruitful it is only fit for destruction. Israel saw themselves as a fruitful vine (Genesis 49:22; Psalms 80:8). God saw them as a wild and useless vine.