The Third Day of Creation was when it all started. Plant life was created just two days after Heaven and Earth, and Night and Day. It must have been a pretty big deal. Humans were not created until three whole days later!
After all this time since Creation, the flora of the World is still just as important as it has always been. Vegans can survive without the consumption of animal products, but no one can survive without the consumption of plants, or the consumption of animals who were sustained by plants. We breath oxygen generated by plants. We live in homes made of wood. We wear clothes made of cotton. Until relatively recent history, wood was the primary fuel for cooking and warmth through winter. Even modern fossil fuels that have replaced wood are derived partly from fossilized plants. There seems to be no end to the long list…