A graceful, pale-mauve delphinium, 'Fanfare' is wonderful for adding a touch of romance to your plot. Look closer, and you'll spot the light blue on its under-petals and white eyes.

View A spray of white briar roses, a yellow-white delphinium, morning glory and red poppy in a vase on a ledge, with a burnet moth A white carnation, stephanotis, blue delphinium, lilac and nasturtium ...

Golden yellow, orange and red are the signature colours of autumn – but to make them truly shine, add striking pops of blue. Here are some stunning examples.