Wind and falling blossoms are the whole story here. The poem watches a breeze lift pink petals off the branches and carry them up into the air, with nowhere in particular to go. The speaker seems delighted by the sight, and that delight comes through in the comparisons: the wind is like a graceful swan, a rushing river, the sea, while the petals are soft as a kitten's fur or drifting like seaweed.
The mood starts out gentle and slowly becomes more playful. Early lines are calm and smooth, but the line "Pink perfect precious petals fly / While wonderful wind wavers in the sky" bounces along on repeated "p" and "w" sounds, as if the words themselves are fluttering. Then the petals and wind "clash" and "collide," compared to lovers dancing or friends wrestling in the grass. It's rough but affectionate, never angry. The poem ends on a short, cheerful burst: "One huge party." Overall it feels free, energetic and joyful, like watching a spring day show off.