I love parks and gardens, although I’m not patient enough to grow flowers or vegetables myself. I gave up on indoor plants years ago, saying I had enough living things to take care of. I didn’t need another one. The rowhouses in Philadelphia sit in the shadow of the skyscrapers, yet window boxes and potted plants abound. These displays take over most of the sidewalk. I’m not sure what to make of the mismatched tall plants flanking this door. In Philadelphia, they don’t need t