Height and movement
Nobody wants a dull, flat border with everything at one height.
Isobel advised: “If your border seems to flower at all one level, then introduce some height with taller perennials and shrubs.
“A drift of Veronicastrum, which comes in pinks, lilacs and white, will add bulk as well as height.
“Thalicturm which is lighter and airier will contrast against denser left shrubs and is perfect at the back of a border.
“Where space is tight, consider Viburnum plicatum ‘Kilamanjaro’, a pretty, deciduous shrub with lace-cap like flowers on tiered branches, can grow up to 3m in height in the right conditions but will only spread to about 1.5m.”