The first paragraph of Watership Down:
The primroses were over. Toward the edge of the wood, where the ground became open and sloped down to an old fence and a brambly ditch beyond, only a few fading patches of pale yellow still showed among the dog's mercury and oak-tree roots. On the other side of the fence, the upper part of the field was full of rabbit holes...
Quote from Chapter 1: The Notice Board
The last paragraph:
He reached the top of the bank in a single, powerful leap. Hazel followed; and together they slipped away, running easily down through the wood, where the first primroses were beginning to bloom.
Quote from the Epilogue
The repetition of primroses at the very start and end of the book seems to be somehow important. Is there some symbolic meaning to how the primroses are "over" at the start and "beginning to bloom" at the end? Is there something about primroses in particular which would help explain the repetition?
Why are primroses emphasized at the start and end of Watership Down?