Rose mallow, Hibiscus syriacus 'Blue Bird', purple blue flower and bud growing on a shrub against a green background.

Ornamental onion, Allium, single purple flower on a stem isolated in shallow focus against green leaves.

Rose mallow, Hibiscus syriacus 'Blue Bird', single purple blue flower growing on a shrub.

Rose mallow, Hibiscus syriacus 'Blue Bird', purple blue flower and buds growing on a shrub against a green background.

Rose mallow, Hibiscus syriacus 'Blue Bird', purple blue bud opening among green leaves on a shrub.

Rose mallow, Hibiscus syriacus 'Blue Bird', purple blue buds opening among green leaves on a shrub.

Nasturtium, Tropaeolum majus, close up of green leaves showing the veins.

Blackthorn, Prunus spinosa, Abundant harvest of purple sloe berries and a few leaves from the shrub in the autumn.

Nasturtium, Tropaeolum majus, close up of orange red flowers against green leaves.

Nasturtium, Tropaeolum majus, red flower isolated in shallow focus against green leaves.

Spinach, Spinacia oleracea, close-up detail of a green vegetable leaf.

Glory bush, Tibouchina urvilleana, purple flower with prominent stamen and buds on an evergreen shrub.