I just returned from a week in Key West. There is a lot to learn about small gardens close to the street. The gardens, like the island, celebrate diversity. Almost every front yard had a picket fence, whether the house was a mansion or a modest cottage. Almost always the gardens were a respite from the sun and heat and felt like much-needed shady jungle. There was a wide range of plants used; many were huge specimens of plants that I use as annuals on my patio. If I built a garden there, it would include two ingredients: a picket fence and spectacular foliage.