Genesis 1 is much more friendly to the idea of plant evolution than it is animal/human evolution. God said "Let THE EARTH bring forth....(three main plant types in order of ascending complexity)". When the animals are created it says God MADE them, then it says He Created man. It seems like there was far less involvement in plants than people.Really? Interesting. Immediately I think of how early man would know, from seeing directly, how baby animals come directly from older animals. But he wouldn't necessarily realize that baby plants come from seeds which came from older plants. Well, once agriculture got started, I guess it would be common knowledge. But before then, during the hunter-gatherer stage, I bet most people assumed that plants just arose spontaneously from dirt.
I beleive that agriculture was already well established prior to the composition of Genesis. Of course you are looking at it as a myth from Chaldean folklore or something. I am looking at it as Divinely inspired. You are thus attempting to reconcile it to your perceptions of what human knowledge was like circa 2000 BC while I am attempting to reconcile it with human knowledge of today ("fact?").
Here's an analogy according to the logic you employed: "Most people today think popcorn is made by machines in a factory."