Perennials on the balcony are wonderful. They impress year after year with their wild beauty and are also more robust and easier to care for than the annual balcony flowers from the garden centre. However, a few things need to be considered for this sustainable planting method. Balconies are often exposed to strong winds and there is less moisture available to the plants in the tub than in the garden soil. Very robust, drought-tolerant varieties should be given preference here.