"Its gray-green leaves are a superb foil to other perennials since the bold foliage is simple and flat, not busy," Mr. Druse said.

One particularly unusual plant in the mix is Delphinium requienii, a half hardy biennial with bold shiny foliage and grey-blue flowers later in summer.

"Natives are huge, and so are plants with bold, tropical foliage."

It is grown as an ornamental plant for its bold foliage and large flowers.

Decaisnea is grown as an ornamental plant for its bold foliage and decorative fruit, bright blue in many cultivated plants, hence the common name dead man's fingers.

It is grown as an ornamental tree for its bold foliage, huge clusters of fruit, and bright autumn colour.

Several species are cultivated as ornamental plants for their bold foliage and large flowers.

It is cultivated as an ornamental plant in western Europe for its bold foliage, with the largest leaves of any willow.

Given the variety available there are enough to fill most of our summer and early autumn days with colour, bold foliage and, let's not forget, happy memories.

The plant has large and bold textured grey foliage.