Can't remember name of short story!

I read this short story in a collection many years ago. It was about a girl who lived with her mother; they grew flowers and vegetables together. One day, the girl took white lilies from the garbage can of a church and planted them in their garden. The pastor came and tried to destroy the vegetables, saying that what they were doing was wrong and pagan. In the struggle, the mother accidentally kil

Can't remember name of short story!