Lovely flower and another really hard puzzle....aaaaagggghhhh!!! I shall survive but either I am aging more rapidly than I thought or I have become inept for putting puzzles together....sigh....I will not stop!! Have a lovely day and may your blessings bring you much love and joy.
When I come upon a puzzle like this, I try to concentrate on the shapes. It seems to help, but it is still a challenge. Putting the darker middle together (after the edges) helped too.