To create a cascade of plants, you can either use an existing feature such as a wall or create a framework for cascading plants. One of the simplest ways to cascade plants is by creating a tiered system of troughs or beds. This will give the stunning visual effect of each plant flowing downwards into the next trough. The trick to creating a floral cascade is to select your plants carefully. However you set up your cascade, it is very likely that the ground will be drier at the top than at the bottom. The bottom is also likely to be shadier, with the top in full sun for longer. Choose drought and sun-loving plants for the top, where they will thrive. Other plants which enjoy cool and damp conditions will be much happier towards the bottom of your cascade.