Often called “4 o’ clock Flowers”, Mirabilis open their multiple trumpet-like flowers in the late afternoon and bloom through the night, releasing a sweet lemony scent into the night air. Often the Mirabilis flowers change their colour as they mature, or entirely different coloured blooms are produced on the same plant. In addition to pristine white, the colour palette includes various shades of yellow, pink and red, and the flowers can be plain, splotched or streaked. Reasonably hardy, Mirabilis does not like frost. Four O'Clocks will reach a height of around 90cm (3ft) if you plant your Mirabilis bulbs in moist rich soil and full sun. They will do well in borders, as edgings or lining garden paths, blooming from summer through to autumn.