Here is the full list of all 14 Flower achievements. It takes around 4-5 hours to unlock all of the achievements on Windows.
Journey to the city unscathed.
Bloom 10,000 flowers.
Play with the windmills and ride the wind seven times.
Play the game after a week long break.
Beyond all flowers lies another room.
Light a darkened pool.
Release all of the names to the sky.
Completely awaken the city.
Take a ten minute break between any dreams.
Reminisce for three minutes before returning to the room.
Life could be simple...
Use the grass as your canvas and paint the ground with three different colors.
The dream has just started...
Find and bloom a secret flower.