Stepping out onto a balcony and experiencing plants unfolding through every season is a quality that can also be enjoyed in an urban space. The 1950s motto of garden artist Vita Sackville-West, "Cram, cram, cram every nook and cranny," is followed as an ideal. Once the planting is in place, insect life follows, allowing even a second-floor balcony to contribute to biodiversity.