The colour of red flowers is caused by the presence of certain biological pigments in the petals, such as carotenoids, anthocyanins and betalains.
Red-flowered plants, chosen wisely, can be the crowning glory of a planting scheme. Grow them alongside plum-coloured blooms for a sumptuous border or container display. Or combine with zingy oranges and cornflower blues for bolder effect.
Plus, hot borders wouldn't be complete without red blooms combined with spicy yellows and oranges.
Check out our handy Plant Finder to discover lots more red-flowered plants.
Discover 10 of the best plants with red flowers, including perennials, shrubs and climbers, below.