A viola as a kind of garden plants has various colours and is easy to use for gardening. This weekend, I tried to shoot the flowers for putting them to WPC then I understood that taking a picture considering better perspective was completely different from cropping a picture. It was very difficult to shoot pictures supposed to be cropped.
Several years ago, I had a chance to hear some hints of perspective from a professional photographer who was good at capturing high speed cars. He said that he sometimes shot it with margin because it might be the last and only one chance.