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the first plants first grow under fresh water about 850 million years ago and they still do in todays world. The plants have evolved from that point on.
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New data and analysis show that plant life began colonising land 500 million years ago, during the Cambrian Period, around the same time as the emergence of the first land animals. These studies are also improving our understanding of how the plant family first evolved.
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The first land plants appeared around 470 million years ago, during the Ordovician period, when life was diversifying rapidly. They were non-vascular plants, like mosses and liverworts, that didn't have deep roots.
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plants have evolved in many different ways from 500 million years ago and some are still evolving today. The most import evolution they made would be to be able to reproduce asexual or sexual with spores.
