This is indeed a relaxing game. The mechanics are easy to grasp, and all the downtime while waiting for the flowers to grow gives you a lot of time to appreciate the graphics, music, sounds and weather effects.
The flower drawings are great. I'd say that the main thing driving me to continue playing was seeing all the different flowers fully grown. It's almost a shame to cut them as soon as they bloom to buy new seeds. I did stop playing once I'd seen them all, without unlocking all the pots.