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