Did God Plant the Forbidden Tree?

A dark riddle was planted in the middle of Eden, and the demise of humanity ensued. What was the forbidden tree? "Every plant which My Heavenly Father has not planted," Jesus declared, "will be uprooted." Which vegetation did God not plant? Jesus refers to Himself as "The True Vine" - as opposed to what? If God did not plant the forbidden tree, then who did? - and why?