Mirabilis jalapa has a different timetable from most other plants. One of its common names is Four O’Clock Flower/Plant. This bushy, tender perennial likes to sleep in late and only opens its flowers at about 4pm, keeping them open until the next morning. Meanwhile it emits the scent of vanilla into the evening and night sky! The yellow, white, pink or sometimes red four o'clock flowers and are trumpet-shaped and bloom from early to mid-summer right through to autumn. Fragrant Addition for Borders, Beds, and Meadows. A tender perennial that forms tubers, plants produce handsome, fragrant, trumpet-shaped flowers that attract birds and butterflies. Easy To Grow. Sow Directly onto Soil. 12-36" Tall. Reseeds Easily. Non GMO and Neonicotinoid Seed Marde Ross & Company has been a Licensed California Nursery since 1985. Mirabilis jalapa has a different timetable from most other plants. So much so that one of its common names is Four O’Clock Flower/Plant or just Four O'Clocks. This bushy, tender perennial likes to sleep in late and only opens its flowers at about 4pm, keeping them open until the next morning. Meanwhile it emits the scent of vanilla into the evening and night sky! The yellow, white, pink or sometimes red four o'clock flowers and are trumpet-shaped and bloom from early to mid-summer right through to autumn.