A large sinuous trench was dug, a butyl liner was put in for moisture retension and seepage, and then the whole trench was filled with a mixture of soil and compost right for moisture-loving plants. It is important to finish all the hard landscaping before moving in the plants. Plant list Ligularia dentata - grown for their large foliage and daisy like flower heads. Astilbe 'Sprite' - summer flowering perennials , grown for their flowers. Sprite' is shell pink coloured which make good dried flowers.
Astilbes come in a variety of colours to suit all borders.
Carex buchananii - evergreen thin copper coloured leaves, perennial sedge. Gunnera mannicata - grown for their very large foliage. Mature leaves can reach over 6ft in width. When the plant dies down in the autumn, the leaves should be left over the corm to give some frost protection. Also loves moist conditions.