Perennials have a life cycle that is completed in more than two growing seasons. Due to its longevity, perennials are used as an alternative to a lawn which maintenance can be very time-and work-consuming. Perennials offer the widest choice of colours, sizes and shapes, which is the reason these plants are so popular. Most of the perennials can be grown in multi-species flower beds and rock gardens. Moreover, perennials are widely used for hedging and as cut flowers.