Pointers from the experts Create excitement in the garden by varying plant textures colours and styles. Use formal topiaries to add form and structure, soften with varying shades of annuals or ground cover perennials. Try silver foliage for contrast: silver Artemisia or lamb's ear (Stachys lanata). Follow your own style be it formal or informal, bright or subtle. Talk to your local experts to determine the best plants for your area, or the best combinations to achieve the effect you want.