It takes our solar system approximately 240 million years to orbit the Milky Way Galaxy, an event known as a galactic year.
If you went back just one galactic year, then flowers would not yet exist; in fact, you would still have to wait another 100 million years before the first flower bloomed.
Dinosaurs had life pretty good for 135 million years (~½ a galactic year) before an extinction event carved the way forward for mammals and birds to proliferate. Humans have existed for 1/100 of a single galactic year, and agriculture has existed for 0.0000417 galactic years.
What will the biological diversity of Earth look like when it returns to its current celestial position? Dinosaurs, flowering plants, birds, and mammals had yet to evolve 1 galactic year ago, and the entirety of agricultural history has existed for the equivalent of 22 galactic minutes, or 0.015 galactic days.